Produção Técnico-Científica do Dr. Luiz Carlos Moura Miranda

Produção Técnico-Científica do Dr. Luiz Carlos Moura Miranda

Compilação por décadas gerada automaticamente pelo URLibService
a partir dos dados contidos no acervo digital
da Memória Técnico-Científica do INPE
Última atualização: 23/06/03

Periodo: 1971-1980

1971 (1)

Miranda, L. C. M.; Ter Haar, D.	art. 1	0
Description of a many-electron system

1972 (3)

Miranda, L. C. M.; Parry, W. E.; Ter Haar, D.	art. 2	2
On Yamada's approach to current stabilization in CdS

Miranda, L. C. M.; Ter Haar, D.	art. 3	10
On plasmon-enhanced sound amplification in piezo-electric semiconductors

Miranda, L. C. M.; Ter Haar, D.	art. 4
Plasma effects in sound amplification in piezo-electric semiconductors

1973 (4)

Coutinho Filho, M. D.; Miranda, L. C. M.; Rezende, S. M.	art. 5	6
Spin-wave amplification in ferromagnetic semiconductors

Fittipaldi, I. P.; Rezende, S. M.; Miranda, L. C. M.	art. 6	2
Parametric excitation of spin waves in ferromagnets via localized magnon modes

Miranda, L. C. M.	art. 7	8
Effect of an electromagnetic wave on magnon damping in ferromagnetic semiconductors

Miranda, L. C. M.	art. 8	19
Electromagnetic generation of acoustic waves in semiconductors

1974 (6)

Coutinho Filho, M. D.; Miranda, L. C. M.; Rezende, S. M.	art. 9
Spin wave amplification in ferromagnertic semiconductors - plasma effects

Coutinho Filho, M. D.; Miranda, L. C. M.; Rezende, S. M.	art. 10	3
Spin-wave amplification in ferromagnetic semiconductors-plasma effects and s-d interaction

Coutinho Filho, M. D.; Miranda, L. C. M.; Rezende, S. M.	art. 11	9
Spin-wave amplification in ferromagnetic semiconductors-magnetoresistance and non-ohmic behavior

Miranda, L. C. M.	art. 12	0
Effect of electron-spin on velocity of sound in magnetic metals

Miranda, L. C. M.	art. 13	0
Landau-level splitting due to spin-orbit interaction in magnetic semiconductors

Miranda, L. C. M.	art. 14	0
Stimulated spin-flip emission from magnetic semiconductors

1975 (7)

Coutinho, S. G.; Miranda, L. C. M.	art. 15	6
Carrier-assisted perpendicular pumping of spin-waves in ferromagnetic semiconductors

Coutinho, S. G.; Miranda, L. C. M.	art. 16	3
Effect of dipolar interaction on spin-wave amplification

Gomes, M. A. F.; Miranda, L. C. M.	art. 17	24
Magnon instability in ferromagnetic semiconductors under strong fields

Miranda, L. C. M.	art. 18	1
Magnon dispersion in ferromagnetic semiconductors and metals under an alectromagnetic-field

Miranda, L. C. M.	art. 19	9
Nonlinear excitation of density fluctuations in electron-magnon systems

Miranda, L. C. M.	art. 20	3
Screening effect on the spin wave amplification in ferromagnetic semiconductors

Tahir-kheli, R. A.; Miranda, L. C. M.; Rezende, S. M.	art. 21	6
Randomly dilute, molecular-field ferromagnet and antiferromagnet

1976 (10)

Amato, M. A.; Miranda, L. C. M.	art. 22	10
Effect of laser-cyclotron resonance on the Landau damping of plasma waves

Amato, M. A.; Miranda, L. C. M.	art. 23	2
Electromagnetic generation of acoustic phonons in semiconductors under strong magnetic-field

Brandi, H. S.; Santos, R. R.; Miranda, L. C. M.	art. 24	9
Hydrogen - atoms in strong magnetic-field-oscillator-strengths

Coutinho, S. G.; Miranda, L. C. M.	art. 25	3
Light scattering from magnons in ferromagnetic semiconductors

Gama, A. A. S. D.; Miranda, L. C. M.; Ferreira, R.	art. 26	0
Note electro-optic effects

Lima, C. A. S.; Miranda, L. C. M.	art. 27	0
Plasmon-assisted sound amplification in semi-conductors under strong

Melo, C. P.; Ferreira, R.; Brandi, H. S.; Miranda, L. C. M.	art. 28	30
Hydrogen Molecule Ion in Strong Magnetic Fields

Miranda, L. C. M.	art. 29	3
Magnon dispersion in ferromagnetic semiconductors and metals under strong fields

Miranda, L. C. M.	art. 30	4
Multiphoton dissociation of diatomic molecules at high intensities

Miranda, L. C. M.	art. 31	27
Phonon damping in the simultaneous presence of intense radiation and magnetic fields

1977 (11)

Amato, M. A.; Miranda, L. C. M.	art. 32	4
Plasma-wave instability in field of an intense electromagnetic wave

Coutinho, S. G.; Miranda, L. C. M.	art. 33	19
Magnon instability in ferromagnetic semiconductors under an intense electromagnetic-field

Ferreira, P. R. R.; Miranda, L. C. M.	art. 34	0
Magnon contribution to phonon damping in ferromagnetic semiconductors

Lima, C. A. S.; Miranda, L. C. M.	art. 35	2
Plasmon-enhanced sound-amplification in piezoelectric semiconductors under a strong magnetic-field

Miranda, L. C. M.	art. 36	11
Amplification of high-frequency phonons in the field of an intense electromagnetic wave

Miranda, L. C. M.	art. 37	1
Effect of cyclotron resonance on the indirect exchange between localized magnetic moments

Pereira, P. R. R.; Amato, M. A.; Miranda, L. C. M.	art. 38	2
Carrier-assisted radiation pumping of spin-waves in ferromagnetic semiconductors under strong magnetic-field

Pereira, P. R. R.; Miranda, L. C. M.	art. 39	1
Magnon damping in ferromagnetic semiconductors under intense radiation and magnetic fields

Scalabrin, A.; Porto, S. P. S.; Vargas, H.; Lima, C. A. S.; Miranda, L. C. M.	art. 40	16
Temperature dependence of the broad A1 (TO) phonon Raman linewidth in BaTiO3

Tenan, M. A.; Miranda, L. C. M.	art. 41	2
On the intensity of electronic and vibrational resonant Raman scattering

Tenan, M. A.; Miranda, L. C. M.	art. 42	0
On the thermoelectric amplification of magnons in ferromagnetic semiconductors

1978 (13)

Almeida, N. S.; Miranda, L. C. M.	art. 43	1
Light scattering from magnons in ferromagnetic semiconductors under strong fields

Brandi, H. S.; Koiller, B.; Lins de Barros, H. G. P.; Miranda, L. C. M.; Castro, J. J.	art. 44	31
Theory of electron-hydrogen-atom collisions in the presence of a laser field

Brandi, H. S.; Koiller, B.; Lins de Barros, H. G. P.; Miranda, L. C. M.	art. 45	12
Charged-particles scattering in the presence of a homogeneous magnetic field

Brandi, H. S.; Koiller, B.; Lins de Barros, H. G. P.; Miranda, L. C. M.	art. 46	4
Inert gas atom-molecule collisions in a laser field: vibrational excitations in homopolar molecular ions

Ghizoni, C. C.; Siqueira, M. A. A.; Vargas, H.; Miranda, L. C. M.	art. 47	27
On the use of photoacoustic cell for investigating the electron-phonon interaction in semiconductors

Gualberto, G. M.; Tenan, M. A.; Vargas, H.; Miranda, L. C. M.; Pelzl, J.	art. 48	4
Resonant Raman effect of O-3 in gamma -irradiated Ba(CLO3)2H2O and AgCLO3

Lima, M. B. S.; Miranda, L. C. M.	art. 49	4
Coulomb screening in the presence of two electromagnetic waves

Lima, C. A. S.; Miranda, L. C. M.; Vargas, H.; Porto, S. P. S.	art. 50	9
Temperature behavior of dielectric-constant of tetragonal BaTiO3

Luzzi, R.; Miranda, L. C. M.	art. 51	29
Optical-properties of semiconductors under intense laser fields

Melo, L. C.; Das, T. K.; Ferreira, R. C.; Miranda, L. C. M.	art. 52	26
The H+2 molecule in strong magnetic fields, studied by the method of linear combinations of orbitals

Melo, C. P.; Melo, L. C.; Das, T. K.; Ferreira, R.; Brandi, H. S.; Miranda, L. C. M.	art. 53
Molecula de H2 em campos magneticos superintensos

Skeff Neto, K.; Cunha Lima, I. C.; Almeida, N. S.; Miranda, L. C. M.	art. 54	2
On the high-temperature behaviour of magnetically ordered microcrystals

Skeff Neto, K.; Miranda, L. C. M.	art. 55	0
Magnetic properties of FeOHSO4- I. Mössbauer spectroscopy

1979 (5)

Cesar, C. L.; Vargas, H.; Meyer, J. A.; Miranda, L. C. M.	art. 56	29
Photoacoustic effect in solids

Lima, M. B. S.; Lima, C. A. S.; Miranda, L. C. M.	art. 57	0
Coulomb screening in the simultaneous presence of a radiation field and a strong DC magnetic field

Lima, M. B. S.; Lima, C. A. S.; Miranda, L. C. M.	art. 58	14
Screening effect on the plasma heating by inverse bremsstrahlung

Lima, M. B. S.; Miranda, L. C. M.	art. 59	0
Phonon instability in the presence of two radiation fields

Tenan, M. A.; Marotta, A.; Miranda, L. C. M.	art. 60	3
On the thermoelectric amplification of sound in semiconductors

1980 (5)

Galembeck, F.; Ghizoni, C. C.; Ribeiro, C. A.; Vargas, H.; Miranda, L. C. M.	art. 61	12
Characterization of a new composite-material - Fe2O3-impregnated poly(tetrafluoroethylene) - particle-size determination and photoacoustic-spectroscopy

Galembeck, F.; Leite, N. F.; Miranda, L. C. M.; Rechenberg, H. R.; Vargas, H.	art. 62	14
An EPR and mossbauer study of ultrafine iron (III) oxide particles in polytetrafluorethylene (PTEE) matrix

Lima, C. A. S.; Miranda, L. C. M.	art. 63	1
On the photoacoustic effect of solids: Influence of surface thermal resistance and surface optical absorption

Santos, R.; Miranda, L. C. M.	art. 64	3
Photoacoustic effect in solid-influence of heat-loss

Siqueira, M. A. A.; Ghizoni, C. C.; Vargas, J. I.; Menezes, E. A.; Vargas, H.; Miranda, L. C. M.	art. 65	35
On the use of the photoacoustic effect for investigating phase-transitions in solids

Periodo: 1981-1990

1981 (8)

Almeida, N. S.; Miranda, L. C. M.	art. 66	1
Influence of direct transitions between spin branches on free-carrier absorption of ferromagnetic semiconductors

Arguello, Z. P.; Bilac, S. A.; Cisneros, J. L.; Tomyiama, M.; Donoso, P.; Miranda, L. C. M.	art. 67	0
On the color variation of a calcium aluminate glass

Lima, C. A. S.; Miranda, L. C. M.	art. 68	27
Atoms in superintense laser fields

Lima, C. A. S.; Miranda, L. C. M.	art. 69	10
Hydrogen atom in superintense laser fields: Correction to the ground-state energy

Lima, C. A. S.; Miranda, L. C. M.; Santos, R.	art. 70	7
Sample-gas thermal contact resistance and the photoacoustic signal generation

Miranda, L. C. M.	art. 71	8
On the multiphoton emission during UV and X-ray absorption by atoms intense laser fields

Nunes, O. A. C.; Miranda, L. C. M.; Tenan, M. A.	art. 72	1
L 0 - phonon instability in the free-carrier absorption in semiconductors under strong magnetic fields

Santos, R.; Miranda, L. C. M.	art. 73	31
Theory of the photothermal radiometry with solids

1982 (5)

Almeida, N. S.; Miranda, L. C. M.	art. 74	3
On the space translation method at high laser fields-upper limit intensity

Landgraf, T. C.; Leite, J. R.; Almeida, N. S.; Miranda, L. C. M.; Lima, C. A. S.	art. 75	17
Spectrum of hydrogen atoms in intense laser fields

Lima, C. A. S.; Mattos, J. C. V.; Penna, A. F. S.; Bulow, J. F. W. V.; Miranda, L. C. M.; Ghizoni, C. C.	art. 76
Photoacoustic assessment of prospective plant productivity

Lima, C. A. S.; Miranda, L. C. M.	art. 77	2
A note on tunneling in the presence of a superintense laser field

Miranda, L. C. M.	art. 78	36
Theory of the photoacoustic effect in semiconductors influence of corrier diffusion and recombination

1983 (11)

Cesar, C. L.; Vargas, H.; Mendes Filho, J.; Miranda, L. C. M.	art. 79	32
Photoacoustic determination of thermal diffusivity of solids: Application to CdS

Galvão, R. M. O.; Almeida, N. S.; Miranda, L. C. M.	art. 80	0
Laser-assisted coulomb-excitation of nuclei

Galvão, R. M. O.; Miranda, L. C. M.	art. 81	2
Parametric distortion of the optical-absorption coefficient of semiconductors by an additional infrared laser

Galvão, R. M. O.; Miranda, L. C. M.	art. 82	5
Quantum-theory of an electron in external fields using unitary transformations

Ghizoni, C. C.; Miranda, L. C. M.	art. 83	0
Influence of the carrier diffusion and recombination on the photo-acoustic signal of semiconductors

Lima, M. B. S.; Lima, C. A. S.; Miranda, L. C. M.	art. 84	0
Collisionless cyclotron absorption of photons by electrons in a laser-beam

Lima, C. A. S.; Miranda, L. C. M.	art. 85	3
Hydrogen molecule ion in superintense laser fields

Miranda, L. C. M.	art. 86	11
Energy-gap distortion in solids under intense laser fields

Miranda, L. C. M.	art. 87	21
Photodisplacement spectroscopy of solids - theory

Miranda, L. C. M.	art. 88	4
On the use of thermal lens effect as a thermooptical spectroscopy pf solids

Miranda, L. C. M.; Galvão, R. M. O.; Lima, C. A. S.	art. 89	3
Effect of a radiation field on electrons bound on liquid helium

1984 (7)

Cesar, C. L.; Vargas, H.; Lima, C. A. S.; Mendes Filho, J.; Miranda, L. C. M.	art. 90	12
On the use of photoacoustic-spectroscopy for investigating adulterated or altered powdered coffee sample

Cesar, C. L.; Vargas, H.; Pelzl, J.; Miranda, L. C. M.	art. 91	16
Phase-resolved photoacoustic microscopy: Application to ferromagnetic layered samples

Galvão, R. M. O.; Miranda, L. C. M.	art. 92	1
Laser-enhanced mobility in semiconducting layered structures

Galvão, R. M. O.; Miranda, L. C. M.; Mendonca, J. T.	art. 93	12
Stochastic dissociation of a laser-driven Morse oscillator

Gerck, E.; Miranda, L. C. M.	art. 94	3
Quantum well lasers tunable by long wavelength radiation

Lima, C. A. S.; Miranda, L. C. M.	art. 95	2
Nonresonant vibrational-excitation of diatomic-molecules-laser-driven morse oscillator model

Netzelmann, U.; Pelzl, J.; Vargas, H.; Cesar, C. L.; Miranda, L. C. M.	art. 96	4
Photoacoustic detection of FMR depth profiles

1985 (8)

Cesar, C. L.; Vargas, H.; Mendes Filho, J.; Miranda, L. C. M.	art. 97	14
Comment on photoacoustic determination of thermal diffusivity of solids: aplication to CdS : response

Cesar, C. L.; Vargas, H.; Miranda, L. C. M.	art. 98	14
Photoacoustic microscopy of layered samples: phase-detection technique

Faria Jr., I. F.; Ghizoni, C. C.; Miranda, L. C. M.	art. 99	13
Photopyroelectric scanning microscopy

Ghizoni, C. C.; Miranda, L. C. M.	art. 100	15
Photopyroelectric measurement of the thermal diffusivity of solids

Lima, C. A. S.; Miranda, L. C. M.	art. 101	2
Vibrational-excitation due to atom molecule collision in an intense laser field

Mandelis, A.; Care, F.; Chan, K. K.; Miranda, L. C. M.	art. 102	30
Photopyrolectric detection of phase-transitions in solids

Mayer, I. L.; Miranda, L. C. M.; Galvão, R. M. O.	art. 103	1
Electron transmission through a potential barrier in the presence of an electromagnetic-field-unitary transformation method

Mayer, I. L.; Miranda, L. C. M.; Tong, B. Y.; Galvão, R. M. O.	art. 104	6
On the stochastic ionisation of electrons in quantum well structures

1986 (6)

Faria Jr., I. F.; Ghizoni, C. C.; Miranda, L. C. M.; Vargas, H.	art. 105	14
Photopyroelectric versus photoacoustic characterization of photovoltaic cells

Galvão, R. M. O.; Miranda, L. C. M.	art. 106	2
A note on the effects of screening on the electronic states of an atom embedded in a laser fusion plasma

John, P. K.; Miranda, L. C. M.; Rastogi, A. C.	art. 107	36
Thermal diffusivity measurement using the photopyroelectric effect

Pessoa Jr., O.; Cesar, C. L.; Patel, N. A.; Vargas, H.; Ghizoni, C. C.; Miranda, L. C. M.	art. 108	98
Two-beam photoacoustic phase measurement of the thermal diffusivity of solids

Rodrigues, N. A. S.; Ghizoni, C. C.; Miranda, L. C. M.	art. 109	4
Experimental evidence of thermoelectric amplification of acoustic waves in nickel

Rodrigues, N. A. S.; Ghizoni, C. C.; Miranda, L. C. M.	art. 110	2
Acoustic wave instability in Ni irradiated by CO2 laser pulses: Thermoelectric amplification

1987 (10)

Bento, A. C.; Vargas, H.; Aguiar, M. M. F.; Miranda, L. C. M.	art. 111	29
Photoacoustic characterization of quartz-thermal-diffusivity

Faria Jr., I. F.; Miranda, L. C. M.; Vargas, H.; Fernandes, E.	art. 112	1
Optical inspection and monitoring of crazing in enamelled wires using light scattering

Hirata, D.; Galvão, R. M. O.; Miranda, L. C. M.	art. 113
Effect of a laser field on the electron-ion scattering in a dense plasma

Leite, N. F.; Cella, N.; Vargas, H.; Miranda, L. C. M.	art. 114	41
Photoacoustic measurement of thermal diffusivity of polymer foils

Lima, G. A. R.; Baesso, M. L.; Arguello, Z. P.; Silva, E. C.; Vargas, H.; Miranda, L. C. M.	art. 115	22
Phase-resolved photoacoustic spectroscopy: application to metallic-ion-doped glasses

Mello, S. M. N.; Ghizoni, C. C.; Miranda, L. C. M.; Vargas, H.	art. 116	5
Photoacoustic characterization of photovoltaic cells

Nery, J. W.; Vargas, H.; Pessoa, H.; Reis, F. D. M.; Gabrielli, A. C.; Miranda, L. C. M.; Vinha, C. A.	art. 117	25
Photoacoustic-spectroscopy for depth-profile analysis and herbicice monitoring in leaves

Perondi, L. F.; Miranda, L. C. M.	art. 118	82
Minimal-volume photoacoustic cell measurement of thermal diffusivity: Effect of the thermoelastic sample bending

Riette, H. L.; Miranda, L. C. M.; Vargas, H.	art. 119	2
Characterization of photovoltaic cells using the photothermal deflection spectroscopy

Silva, M. D.; Bandeira, I. N.; Miranda, L. C. M.	art. 120	13
Open-cell photoacoustic radiation detector

1988 (2)

Torres Filho, A.; Perondi, L. F.; Miranda, L. C. M.	art. 121	22
Photoacoustic monitoring of adhesive curing

Vargas, H.; Miranda, L. C. M.	art. 122	168
Photoacoustic and related photothermal techniques

1989 (13)

Arista, N. R.; Galvão, R. O. M.; Miranda, L. C. M.	art. 123	7
Laser-field effects on the interaction of charged particles with a degenerate electron gas

Baesso, M. L.; Mansanares, A. M.; Silva, E. C.; Vargas, H.; Miranda, L. C. M.	art. 124	16
Phase-resolved photoacoustic spectroscopy and EPR investigation of MnO2- and CoO-doped soda-lime glasses

Bento, A. C.; Aguiar, M. M. F.; Vargas, H.; Silva, M. D.; Bandeira, I. N.; Miranda, L. C. M.	art. 125	9
Open photoacoustic cell X-ray-detection

Bento, A. C.; Mansanares, A. M.; Vargas, H.; Miranda, L. C. M.	art. 126	3
Photoacoustic measurement of the thermal-diffusivity of anisotropic samples using the phase lag method

Cella, N.; Vargas, H.; Galembeck, E.; Galembeck, F.; Miranda, L. C. M.	art. 127	9
Photoacoustic monitoring of crosslinking reactions in low-density polyethlene

Ferreira, S. O.; Chen, Y. A.; Bandeira, I. N.; Miranda, L. C. M.; Vargas, H.	art. 128	15
Photoacoustic measurement of the thermal diffusivity of Pb1-xSnxTe alloys

Hirata, D.; Galvão, R. M. O.; Miranda, L. C. M.	art. 129
Effect of a laser field on the electron-ion scattering in a dense plasma

Iacovacci, M.; Silva, E. C.; Vargas, H.; Galembeck, F.; Pinheiro, E. A.; Miranda, L. C. M.	art. 130	3
Photoacoustic monitoring of magnetite-crystal formation from iron(III) hydroxide acetate: Comparison with ESR results

Leite, N. F.; Russo, L. C.; Miranda, L. C. M.; Ribeiro, M. F.; Miranda, P. B.; Oliva, R. V.; Nogueira, R. A.; Ueki, R. K.; Luz, R. O.	art. 131
Campact photothermal spectrometer using liquid crystal choppers

Mansanares, A. M.; Baesso, M. L.; Silva, E. C.; Gandra, F. C. G.; Vargas, H.; Miranda, L. C. M.	art. 132	17
Photoacoustic and ESR studies of iron-doped soda-lime glasses: Thermal diffusivity

Pinto Neto, A.; Vargas, H.; Miranda, L. C. M.; Leite, N. F.	art. 133	25
Photoacoustic investigation of semiconductors: Influence of carrier diffusion and recombination in PbTe and Si

Torres Filho, A.; Leite, N. F.; Miranda, L. C. M.; Cella, N.; Vargas, H.	art. 134	23
Photoacoustic investigation of iodine-doped polystyrene

Torres Filho, A.; Leite, N. F.; Miranda, L. C. M.; Stempniak, R. A.	art. 135	2
Laser-induced iodine desorption from impregnated polystyrene

1990 (6)

Arista, N. R.; Galvão, R. O. M.; Miranda, L. C. M.	art. 136	4
Influence of a strong laser field on the stopping power for charged test particles in nondegenerated plasma

Fabbri, M.; Bandeira, I. N.; Miranda, L. C. M.	art. 137	1
A model for the solute transport in PbSnTe growth by vapor-melt-solid technique

Franzan, A. H.; Leite, N. F.; Vargas, H.; Miranda, L. C. M.	art. 138	9
Investigation of poling effects on PVDF pyroelectric detectors-photoacoustic thermal-diffusivity measurements

Leite, N. F.; Franzan, A. H.; Torres Filho, A.; Miranda, L. C. M.	art. 139	4
Dielectric-constant, optical-transmission, and thermal-diffusivity monitoring of iodine-impregnated polystyrene films

Mansanares, A. M.; Bento, A. C.; Vargas, H.; Leite, N. F.; Miranda, L. C. M.	art. 140	48
Photoacoustic measurement of the thermal properties of two-layer systems

Rodrigues, N. A. S.; Miranda, L. C. M.	art. 141	1
Thermoelectric amplification of acoustic waves observed in Ni using optical-beam-deflection detection

Periodo: 1991-2000

1991 (2)

Marquezini, M. V.; Cella, N.; Mansanares, A. M.; Vargas, H.; Miranda, L. C. M.	art. 142	59
Open photoacoustic cell spectroscopy

Pinto Neto, A.; Vargas, H.; Miranda, L. C. M.	art. 143	7
Amorphization of ion-implanted layers in silicon using photoacoustic detection

1992 (4)

Leite, N. F.; Miranda, L. C. M.	art. 144	7
Photoacoustic characterization of the effects of air inclusion on the thermal-properties of foamed polyurethane

Leite, N. F.; Miranda, L. C. M.	art. 145	8
Thermal Property measurements of liquid samples using photoacoustic detection

Lima, J. C.; Cella, N.; Miranda, L. C. M.; Chen, Y. A.; Franzan, A. H.; Leite, N. F.	art. 146	6
Photoacoustic characterization of chalcogenide glasses: Thermal diffusivity of GexTe1-x

Pereira, A. C.; Zerbetto, M.; Silva, G. C.; Vargas, H.; Silva, W. J.; Neto, G. O.; Cella, N.; Miranda, L. C. M.	art. 147	13
OPC technique for in vivo studies in plant photosynthesis research

1993 (2)

Miranda, L. C. M.; Cella, N.	art. 148	8
Evaporation and contraction of a droplet that wets a surface monitored by photoacoustic detection

Silva, W. J.; Vidal, B. C.; Martins, M. E. Q.; Vargas, H.; Pereira, A. C.; Zerbetto, M.; Miranda, L. C. M.	art. 149	5
What makes popcorn pop

1994 (2)

Pereira, A. C.; Neto, G. O.; Vargas, H.; Cella, N.; Miranda, L. C. M.	art. 150	7
On the use of the open photoacoustic cell technique for studying photosynthetic O2 evolution of undetached leaves: Comparison with Clark-type O2 electrode

Silva, M. D.; Miranda, L. C. M.	art. 151	0
Modifications of the dielectric and thermal properties of vulcanized natural rubber due to iodine doping

1995 (2)

Silva, W. J.; Prioli, L. M.; Magalhães, A. C. N.; Pereira, A.; Vargas, H.; Mansanares, A. M.; Cella, N.; Miranda, L. C. M.; Alvarado-Gil, J.	art. 152	11
Photosynthetic O2 evolution in maize inbreds and their hybrids can be differentiated by open photoacoustic cell technique

Yanezlimon, M.; Rodriguez, M. E.; Alvara do Gil, J. J.; Zelayaangel, O.; Sanchezsinencio, F.; Cruz Orea, A.; Vargas, H.; Figueroa, J. D. C.; Martinezbustos, F.; Martinez, J. L.; Gonzalez Hernandez, J.; Arguello, C.; Miranda, L. C. M.	art. 153	10
Photoacoustic measurements of thermal-diffusivity and correlation with viscosity of instant corn dry masa flour

1996 (4)

Acosta-Avalos, D.; Alvarado-Gil, J. J.; Vargas, H.; Frías-Hernández, J.; Olalde-Portugal, V.; Miranda, L. C. M.	art. 154	5
Photoacoustic monitoring of the influence of arbuscular mycorrhizal infection on the photosynthesis of corn (Zea mays L.),

Balderas-López, J. A.; Gutiérrez-Juárez, G.; Alvarado-Gil, J. J.; Frías-Hernández, J.; Olalde-Portugal, V.; Miranda, L. C. M.; Silva, M. D.; Delgadillo, I.; Vargas, H.	art. 155	1
A new CO2 analyzer for measuring respiration rates in organic material

Cruz-Orea, A.; Delgadillo, I.; Vargas, H.; Pichardo, J. L.; Alvarado-Gil, J. J.; Miranda, L. C. M.	art. 156	0
On the use of the photoacoustic technique for the measurement of the thermomechanical properties of semiconductor two-layer systems

Rodriguez, M. E.; YanezLimon, M.; Alvarado Gil, J. J.; Vargas, H.; Sanchez Sinencio, F.; Figueroa, J. D. C.; Martinez Bustos, F.; Martinez Montes, J. L.; GonzalezHernandez, J.; Silva, M. D.; Miranda, L. C. M.	art. 157	9
Influence of the structural changes during alkaline cooking on the thermal, rheological, and dielectric properties of corn tortillas

1997 (4)

Alvarado-Gil, J. J.; Vargas, H.; Sanchez Sinencio, F.; Gonzalez Hernandez, J.; Miranda, L. C. M.	art. 158	5
Effect of lime content on the processing conditions of cooked maize tortillas: Changes of thermal, structural, and rheological properties

Calderón, A.; Alvarado-Gil, J. J.; Gurevich, Y. G.; Cruz-Orea, A.; Delgadillo, I.; Vargas, H.; Miranda, L. C. M.	art. 159	15
Photothermal Characterization of Electrochemical Etching Processed n-Type Porous Silicon

Delgadillo, I.; Cruz-Orea, A.; Vargas, H.; Calderón, A.; Alvarado-Gil, J. J.; Miranda, L. C. M.	art. 160	4
Photoacoustic technique for monitoring the thermal properties of porous silicon

Veleva, L.; Tomás, S. A.; Marín, E.; Cruz-Orea, A.; Delgadillo, I.; Alvarado-Gil, J. J.; Quintana, P.; Pomés, R.; Sánchez, F.; Vargas, H.; Miranda, L. C. M.	art. 161	4
On the use of the photoacoustic technique for corrosion monitoring of of metals: Cu an Zn oxides formed in tropical envirnments

1998 (3)

Almeida, J. R. M.; Cella, N.; Monteiro, S. N.; Miranda, L. C. M.	art. 162	4
Thermal diffusivity of an epoxy system as a function of the hardener content

Guarcia-Quiroz, A.; Tomas, S. A.; Vargas, H.; Cruz-Orea, A.; Alvarado-Gill, J. J.; Velava, L.; Miranda, L. C. M.	art. 163	2
Photoacoustic spectroscopy of corrosion products of copper formed in tropical environments

Tomás, S. A.; Sammiguel, R. E.; Cruz-Orea, A.; Gomes da Silve, M.; Sthel, M. S.; Vargas, H.; Miranda, L. C. M.	art. 164	2
Photoacoustic detection of water vapour permeability in ZrO2-TiO2 ceramic

1999 (5)

Baesso, M. L.; Bento, A. C.; Duarte, A. R.; Neto, A. M.; Miranda, L. C. M.; Sampaio, J. A.; Catunda, T.; Gama, S.; Gandra, F. C. G.	art. 165	21
Nd2O3 doped low silica calcium aluminosilicate glasses: thermomechanical properties

Frias-Hernandez, J. T.; Aguilar-Ledezma, A. L.; Olalde-Portugal, V.; Balderas-Lopez, J. A.; Gutierrez-Juarez, G.; Alvarado-Gil, J. J.; Castro, J. J.; Vargas, H.; Albores, A.; Dendooven, L.; Balderas-Lopez, J. A.; Miranda, L. C. M.; Frias-Hernandez, J. T.	art. 166	1
Soil characteristics in semiarid highlands of central Mexico as affected by mesquite trees (Prosopis laevigata)

Lima, S. M.; Catunda, T.; Lebullenger, R.; Hernandes, A. C.; Miranda, L. C. M.; Baesso, M. L.; Bento, A. C.	art. 167	23
Temperature dependence of thermo-optical properties of fluoride glasses determined by thermal lens spectrometry

Sampaio, J. A.; Catunda, T.; Gandra, F. C. G.; Gama, S.; Bento, A. C.; Miranda, L. C. M.; Baesso, M. L.	art. 168	9
Structure and properties of water free Nd2O3 doped low silica calcium aluminate glasses

Sousa, D. F.; Zonetti, L. F. C.; Bell, M. J. V.; Sampaio, J. A.; Nunes, L. A. O.; Baesso, M. L.; Bento, A. C.; Miranda, L. C. M.	art. 169	7
On the observation of 2.8 µm emission from diode-pumped Er3 + - and Yb3 + -doped low silica calcium aluminate

2000 (9)

Baesso, M. L.; Bento, A. C.; Miranda, L. C. M.; Souza, D. F.; Sampaio, J. A.; Nunes, L. A. O.	art. 170	1
Rare-earth doped low silica calcium aluminosilicate glasses for near and mid Infrared applications

Batista, J. A.; Mansanares, A. M.; Silva, E. C.; Vaz, C. C.; Miranda, L. C. M.	art. 171	3
Contrast enhancement in the detection of defects in transparent layered structures: the use of optothermal interference technique in solar cell investigation

Lima, C. A. S.; Lima, M. B. S.; Miranda, L. C. M.; Baeza, J.; Freer, J.; Reyes, N.; Ruiz, J.; Silva, M. D.	art. 172	6
Photoacoustic characterization of bleached wood pulp and finished papers

Lima, C. A. S.; Lima, M. B. S.; Oliva, R.; Cardenas, G.; Miranda, L. C. M.	art. 173	0
Photoacoustic assessment of oscillations in water vapor desorption from nanostructured catalytic surfaces

Lima, J. A. P.; Marín, E.; Correa, O.; Silva, M. G.; Cardoso, S. L.; Gatts, C.; Rezende, C. E.; Vargas, H.; Miranda, L. C. M.	art. 174	8
Measurement of the thermal properties of liquids using a thermal wave interferometer

Lima, J. A. P.; Marín, E.; Silva, M. G.; Sthel, M. S.; Cardoso, S. L.; Takeuti, D. F.; Gatts, C.; Vargas, H.; Rezende, C. E.; Miranda, L. C. M.	art. 175	11
On the use of the thermal wave resonator cavity sensor for monitoring hydrocarbon vapors

Lima, S. M.; Sampaio, J. A.; Catunda, T.; Bento, A. C.; Miranda, L. C. M.; Baesso, M. L.	art. 176	13
Mode-mismatched thermal lens spectrometry for thermo-optical properties measurement in optical glasses: a review

Sampaio, J. A.; Catunda, T.; Coelho, A. A.; Gama, S.; Bento, A. C.; Miranda, L. C. M.; Baesso, M. L.	art. 177	2
Thermo-mechanical and optical properties of calcium aluminosilicate glasses doped with Er3+ and Yb3+

Sousa D. F.; Sampaio, J. A.; Nunes, L. A. O.; Baesso, M. L.; Bento, A. C.; Miranda, L. C. M.	art. 178	2
Energy transfer and the 2.8-mu m emission of Er3+- and Yb3+-doped low silica content calcium aluminate

Periodo: 2001-2003

2001 (15)

Baesso, M. L.; Pelisson, E.; Rohling, J. H.; Medina, A. N.; Bento, A. C.; Miranda, L. C. M.; Lima, S. M.; Sampaio, J. A.; Catunda, T.	art. 179	2
Temperature dependence of thermo-optical properties of optical glasses determined by Thermal Lens Spectrometry

Batista, J. A.; Mansanares, A. M.; Silva, E. C.; Vaz, C. C.; Miranda, L. C. M.	art. 180	0
Optothermal interference technique applied to the investigation of transparent layered structures

Fontes, A. S.; Bento, A. C.; Miranda, L. C. M.; Baesso, M. L.	art. 181	1
Thermal lens evaluation of the presence of adulterants in brewed coffee

Lima, J. A. P.; Cardoso, S. L.; Silva, M. G.; Sthel, M. S.; Gatts, C. E. N.; Vargas, H.; Miranda, L. C. M.	art. 182	1
Thermal diffusivity as an automotive fuel characterization parameter: correlation with motor octane number

Lima, J. A. P.; Marín, E.; Silva, M. G.; Sthel, M. S.; Schramm, D. U.; Cardoso, S. L.; Vargas, H.; Miranda, L. C. M.	art. 183	1
Characterization of the thermal properties of gases using a thermal wave interferometer

Lima, J. A. P.; Marín, E.; Massunaga, M. S. O.; Correa, O.; Cardoso, S. L.; Vargas, H.; Miranda, L. C. M.	art. 184	1
Measurement of the thermal properties of liquid mixtures using a thermal wave interferometer

Lima, J. A. P.; Marín, E.; Silva, M. G.; Sthel, M. S.; Cardoso, S. L.; Vargas, H.; Miranda, L. C. M.	art. 185	5
Application of the thermal wave resonator to the measurement of the thermal diffusivity of gas mixtures

Lima, C. A. S.; Oliva, R.; Cardenas, G.; Silva, E. N.; Miranda, L. C. M.	art. 186	1
Influence of the thermal annealing on the electrical resistivity and thermal diffusivity of Pd : Ag nanocomposites

Mura, J.; Miranda, L. C. M.; Baesso, M. L.; Bento, A. C.; Rubira, A. F.	art. 187	1
Piezo- and pyroelectric photothermal characterization of polymers as a function of temperature

Olenka, L.; Silva, E. N.; Santos, W. L. F.; Muniz, E. C.; Rubina, A. F.; Cardoso, L. P.; Medina, A. N.; Miranda, L. C. M.; Baesso, M. L.; Bento, A. C.	art. 188	5
Evaluation of the thermophysical properties of modified and dyed poly(ethylene terephthalate) films

Olenka, L.; Silva, E. N.; Santos, W. L. F.; Rubira, A. F.; Muniz, E. C.; Medina, A. N.; Cardoso, L. P.; Baesso, M. L.; Miranda, L. C. M.; Bento, A. C.	art. 189	1
Crystallinity changes evidence in modified and dyed Poly(ethylene terephthalate) films monitored by photothermal method

Pereira, J. D.; Silva, E. C.; Mansanares, A. M.; Miranda, L. C. M.	art. 190	1
Simultaneous determination of the thermal properties for liquid and pasty materials from photopyroeletric measurements

Rohling, J. H.; Caldeira, A. M. F.; Pereira, J. R. D.; Medina, A. N.; Bento, A. C.; Baesso, M. L.; Miranda, L. C. M.; Rubira, A. F.	art. 191	12
Thermal lens scanning of the glass transition in polymers

Rohling, J. H.; Medina, A. N.; Bento, A. C.; Pereira, J. R. D.; Rubira, A. F.; Baesso, M. L.; Miranda, L. C. M.	art. 192	8
Differential thermal lens temperature scanning approach to glass transition analysis in polymers: application to polycarbonate

Rohling, J. H.; Medina, A. N.; Pereira, J. R. D.; Rubira, A. F.; Bento, A. C.; Miranda, L. C. M.; Baesso, M. L.	art. 193	3
Thermal lens versus DSC measurements for glass transition analysis of polymer

2002 (3)

Lima, C. A. S.; Miranda, L. C. M.	art. 194	0
On a simple model for the rate of surface coverage due to gas adsorption onto active porous samples exposed to rapidly varying gas phase concentration

Lima, J. A. P.; Silva, M. G.; Massunaga, M. S. O.; Marín, E.; Vargas, H.; Miranda, L. C. M.	art. 195	1
Monitoring of hydrocarbon vapor diffusion in air using a thermal wave interferometer

Rohling, J. H.; Mura, J.; Pereira, J. R. D.; Palangana, A. J.; Medina, A. N.; Bento, A. C.; Baesso, M. L.; Miranda, L. C. M.	art. 196	3
Thermal Lens Temperature Scanning for Quantitative Measurements in Complex Fluids

2003 (4)

Lima, J. A. P.; Silva, M. G.; Masssunaga, M. S. O.; Cardoso, S. L.; Vargas, H.; Marín, E.; Miranda, L. C. M.	art. 197	0
Monitoring of gas diffusion in air using the TWI technique: Thermal diffusivity measurements made easy

Lima, J. A. P.; Silva, M. G.; Sthel, M. S.; Cardoso, S. L.; Vargas, H.; Marín, E.; Miranda, L. C. M.	art. 198	0
Measurement of mass diffusivity in air using thermal wave interference detection

Rohling, J. H.; Pereira, J. R. D.; Medina, A. N.; Bento, A. C.; Baesso, M. L.; Sampaio, J. A.; Lima, S. M.; Catunda, T.; Miranda, L. C. M.	art. 199	0
Thermal lens temperature scanning for quantitative measurements in transparent materials (invited)

Vargas, H.; Miranda, L. C. M.	art. 200	0
Photothermal techniques applied to thermophysical properties measurements (plenary)

art. 1

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M. Ter Haar, D.
Título	Description of a many-electron system
Revista	Physica Norvegica
Ano	1971
Volume	5
Número	3-4
Páginas	225-227
Palavras-Chave	Plasmons
Resumo	We discuss how far the description of a system of electrons embedded in a positively charged uniform background through a Hamiltonian including plasmon terms is a consistent one.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:6 , Times Cited:0
Área	FISMAT
Afiliação	Department of Theoretical Physics, Oxford University, England

art. 2

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M. Parry, W. E. Ter Haar, D.
Título	On Yamada's approach to current stabilization in CdS
Revista	Solid State Communications
Mês	June
Ano	1972
Volume	10
Número	11
Páginas	1061-1063
Palavras-Chave	Yamada's neglect, Kinetic equation, Phonons
Resumo	We justify Yamada's neglect of one of the non-linear terms in the kinetic equation for the phonon intensity and discuss a probable stabilization mechanism for small-wavenumber phonons.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 21, Times Cited: 2
Área	FISMAT
Afiliação	Department of Theoretical Physics, University of Oxford

art. 3

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M. Ter Haar, D.
Título	On plasmon-enhanced sound amplification in piezo-electric semiconductors
Revista	Physics Letters A
Mês	Apr.
Ano	1972
Volume	39
Número	1
Páginas	15-16
Palavras-Chave	Piezoelectricity, semiconductors, Plasmons
Resumo	We show that the amplification of sound waves in a piezo-electric semiconductor may be greatly influenced by processes involving plasmons. For instance, for the case of GaAs the amplification factor for a sound wave with a wave number close to the Debye wave number may be four times as large as was previously estimated.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited reference: 16, Times Cited: 10
Área	FISMAT
Afiliação	Department of Theoretical Physics, Oxford University

art. 4

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M. Ter Haar, D.
Título	Plasma effects in sound amplification in piezo-electric semiconductors
Revista	Revista Brasileira de Física
Ano	1972
Volume	2
Número	2
Páginas	77-87
Palavras-Chave	Piezoelectricity , Semiconductors, InSb, GaAs, Oscillations, Phonons
Resumo	By considering the influence of phonon emission by charge carriers moving in the field of plasma oscillations, we show that for piezo-electric semiconductors such as InSb and GaAs the sound wave amplification process may be appreciably larger than would follow from a theory in which plasma effects are neglected. Considerando a influência da emissão de fonons por transportadores de cargas em movimento em um meio onde há oscilações de plasma, mostra-se que em materiais semicondutores piezo-elétricos, tais como InSb e GaAs, o processo de amplificação da onda sonora pode ser sensivelmente maior na presença de efeitos do plasma do que quando tais efeitos são ignorados.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E
Área	FISMAT
Afiliação	Department of Theorethical Physics, University of Oxford

art. 5

Tipo da Referência	Journal Article
Autor	Coutinho Filho, M. D. Miranda, L. C. M. Rezende, S. M.
Título	Spin-wave amplification in ferromagnetic semiconductors
Revista	Physica Status Solidi B: Basic Research
Ano	1973
Volume	57
Número	1
Páginas	85-91
Palavras-Chave	Ferromagnetic materials, semiconductors
Resumo	The damping coefficient of magnons interacting with drifting carriers in ferromagnetic semiconductors for both k l > 1 and k l < 1 regimes is calculated. It is shown that for CdCr2Se4 the amplification factor can be of the order or greater than the losses of spin waves due to other effects.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:16 , Times Cited:6
Área	FISMAT
Afiliação	Universidade Federal de Pernambuco, Instituto de Física

art. 6

Tipo da Referência	Journal Article
Autor	Fittipaldi, I. P. Rezende, S. M. Miranda, L. C. M.
Título	Parametric excitation of spin waves in ferromagnets via localized magnon modes
Revista	Solid State Communications
Mês	Dec.
Ano	1973
Volume	13
Número	11
Páginas	1797-1799
Palavras-Chave	Ferromagnetic materials, magnons
Resumo	The possibility to excite ferromagnetic magnons with very large k is analyzed theoretically. The proposed excitation mechanism is analogous to the first-order Suhl instability and takes place via non-linear processes involving localized modes associated with imputities in ferromagnetic insulators. A rough estimate of the critical power of a far-infrared laser source necessary to attain the instability threshold shows that the processes are experimentally feasible.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 11, Times Cited: 2
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade Federal de Pernambuco

art. 7

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Effect of an electromagnetic wave on magnon damping in ferromagnetic semiconductors
Revista	Physica Status Solidi B: Basic Research
Ano	1973
Volume	60
Número	2
Páginas	617-623
Palavras-Chave	Magnon interactions, Ferromagnetic materials
Resumo	On the assumption of a weak electron-magnon interaction, a dispersion equation is obtained for magnons in the presence of na electromagnetic wave. It is shown that the correction added to the frequency and damping of a magnon on account of interaction with the electrons may undergo oscillations. Some possible consequences of this effect are discussed, particularly, in connection with the problem of spin wave amplification.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:12 , Times Cited:8
Área	FISMAT
Afiliação	Universidade Fedeeral de Pernambuco

art. 8

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Electromagnetic generation of acoustic waves in semiconductors
Revista	Physics Letters A
Mês	Nov.
Ano	1973
Volume	46
Número	1
Páginas	25-26
Palavras-Chave	Electromagnetic waves, semiconductors.
Resumo	We show that the electronic contribution to the conversion of an incident electromagnetic wave into acoustic waves may greatly influence the rate of amplification of sound waves in piezoelectric semiconductors.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 19
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade Federal de Pernambuco

art. 9

Tipo da Referência	Journal Article
Autor	Coutinho Filho, M. D. Miranda, L. C. M. Rezende, S. M.
Título	Spin wave amplification in ferromagnertic semiconductors - plasma effects
Revista	Revista Brasileira de Física
Ano	1974
Volume	4
Número	3
Páginas	399-411
Palavras-Chave	Magnons, Semiconductors, Ferromagnetic materials, Plasma effects
Resumo	We have evaluated the damping coefficient of magnons interacting with drifting carriers in ferromagnetic semiconductors for both kl > 1 and k1 < 1 regimes. It is shown that for CdCr2Se4 the amplification factor can be of the order or greater than the losses of spin waves due to other effects. It is also discussed the influence of plasma effects on the spin wave amplification problem. Calculamos o coeficiente de amortecimento de magnons interagindo com portadores em semicondutores ferromagnéticos tanto para k1 > 1 como para k1 < 1. Mostra-se que, para o CdCr2Se,o fator de amplificação pode ser de mesma ordem ou maior que as perdas de ondas de spin devidas a outros efeitos. Discute-se também a influência dos efeitos de plasma no problema da amplificação das ondas de spin.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E
Área	FISMAT
Afiliação	Universidade de Pernambuco, Instituto de Física

art. 10

Tipo da Referência	Journal Article
Autor	Coutinho Filho, M. D. Miranda, L. C. M. Rezende, S. M.
Título	Spin-wave amplification in ferromagnetic semiconductors-plasma effects and s-d interaction
Revista	Physica Status Solidi B: Basic Research
Ano	1974
Volume	65
Número	2
Páginas	689-697
Palavras-Chave	Ferromagnetic materials, Semiconductors, Plasma effects
Resumo	We evaluated the effects of the s-d interaction and of plasmon- assisted processes on the spin-wave amplification by drifting carriers in ferromagnetic semiconductors. Under the experimental conditions in CdCr2Se4 the contributions of these processes to the amplification factor are negligible compared with that one due to interaction of the current previously analyzed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 30, Times Cited:3
Área	FISMAT
Afiliação	Universidade Federal de Pernambuco

art. 11

Tipo da Referência	Journal Article
Autor	Coutinho Filho, M. D. Miranda, L. C. M. Rezende, S. M.
Título	Spin-wave amplification in ferromagnetic semiconductors-magnetoresistance and non-ohmic behavior
Revista	Physica Status Solidi B: Basic Research
Ano	1974
Volume	66
Número	1
Páginas	395-405
Palavras-Chave	Ferromagnetic materials, semiconductors
Resumo	The influence of magnon amplification on the magnetoresistance of ferromagnetic semiconductors is analyzed microscopically. A simple model for the non-linear relaxation of magnons is proposed which can explain the existing measurements in CdCr2Se4.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:32 , Times Cited:9
Área	FISMAT
Afiliação	Universidade Federal de Pernambuco, Instituto de Física

art. 12

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Effect of electron-spin on velocity of sound in magnetic metals
Revista	Physica Status Solidi B: Basic Research
Ano	1974
Volume	66
Número	2
Páginas	K91-K94
Palavras-Chave	Magnetic fields, propagation of the sound
Resumo	The effect of extremal magnetic fields on the velocity of sound in normal metals has been investigated ny many authors. The theory predicts an increase in the sound velocity which depends quadratically on the magnetic field and depends also on the angle between the magnetic field and the direction of propagation of the sound waves. These effects have been confirmed experimentally. In working out these theorie one often neglects the posssible effects of the interaction of the magnetic field with the magnetic moment of the conduction electrons.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:10 , Times Cited:0
Área	FISMAT
Afiliação	Universidade Federal de Pernambuco

art. 13

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Landau-level splitting due to spin-orbit interaction in magnetic semiconductors
Revista	Physica Status Solidi B: Basic Research
Ano	1974
Volume	65
Número	1
Páginas	K63-K66
Palavras-Chave	Magnetic fields, Semiconductors, Spin orbit, Transport properties
Resumo	The effect of intense magnetic fields in semiconductors has been widely discussed for some time whereas to the knowledge of the present autihor there is no paper up to date devoted to this subject in the case of magnetic semiconductors.In dealing with magnetic semicontuctors, however, the amphasis so far has been on the study of their optical and transport properties in the presence of magnetic fields sufficiently weak so that its effect on the carrier motion is negligible.Extensive reviews covering both the theoretical and experimental studies of magenetic semiconductors are now avaible.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:9 , Times Cited:0
Área	FISMAT
Afiliação	Universidade Fedeeral de Pernambuco

art. 14

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Stimulated spin-flip emission from magnetic semiconductors
Revista	Physics Letters A
Mês	Dec.
Ano	1974
Volume	50
Número	5
Páginas	347-348
Palavras-Chave	semiconductors, Ferromagnetic materials
Resumo	We show that by inverting the spin state population in a s-d model one might get a temperature tunable stimulated spin-flip emission line in ferromagnetic semiconductors.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 8, Times Cited: 0
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade Federal de Pernambuco

art. 15

Tipo da Referência	Journal Article
Autor	Coutinho, S. G. Miranda, L. C. M.
Título	Carrier-assisted perpendicular pumping of spin-waves in ferromagnetic semiconductors
Revista	Progress of Theoretical Physics
Mês	Oct.
Ano	1975
Volume	54
Número	4
Páginas	927-938
Palavras-Chave	Spin pumping, ferromagnetic materils, semiconductors
Resumo	The carrier contribution to the generation of spin waves in ferromagnetic semiconductors under perpendicular pumping conditions is discussed. It is shown that for degenerate semiconductors this electronic contribution predicts a threshold pumping power of the same order of magnitude as the one involved in the direct mechanism of spin waves excitation. Also the carrier assisted mechanism excites spin waves K in a broad range if values in contrast with the direct mechanism.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 35, Times Cited: 6
Área	FISMAT
Afiliação	Universidade Federal de Pernambuco, Departamento de Física Department of Physics, University of Arizona

art. 16

Tipo da Referência	Journal Article
Autor	Coutinho, S. G. Miranda, L. C. M.
Título	Effect of dipolar interaction on spin-wave amplification
Revista	Nuovo Cimento Della Societa Italiana di Fisica B: General Physics Relativity Astronomy and Mathematical Physics and Methods
Ano	1975
Volume	28
Número	1
Páginas	161-170
Palavras-Chave	random, Antiferromagnetic materials, Ferromagnetic materials
Resumo	A Single-site molecular-field model for randomly dilute ferro and antiferromagnets is presented. Computations for the magnetization are given for several concentrations.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 20, Times Cited: 3
Área	FISMAT
Afiliação	Universidade Federal de Pernambuco, Departamento de Física

art. 17

Tipo da Referência	Journal Article
Autor	Gomes, M. A. F. Miranda, L. C. M.
Título	Magnon instability in ferromagnetic semiconductors under strong fields
Revista	Physical Review B
Mês	Nov.
Ano	1975
Volume	12
Número	9
Páginas	3788-3794
Palavras-Chave	magnons, Magnetic fields, semiconductors
Resumo	The problem of magnon instability in an electron-magnon system is studied in the presence of a static uniform magnetic field. It is found that the magnons may become unstable when certain threshold values for the drift velocity and the magnetic field are exceeded. However, even after the thresholds are exceeded, it is predicted that there exist alternate bands of the magnetic field, in which the magnons are unstable in one band, stable in the next band, unstable again in the following band, etc. These alternate bands have their origin in the discreteness of the Landau levels of the electrons.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference 27, Times Cited: 24
Área	FISMAT
Afiliação	Departmento de Física, Universidade Federal de Pernambuco

art. 18

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Magnon dispersion in ferromagnetic semiconductors and metals under an alectromagnetic-field
Revista	Progress of Theoretical Physics
Mês	May
Ano	1975
Volume	53
Número	5
Páginas	1510-1511
Palavras-Chave	Semiconductors, Ferromagnetic materials, Spin waves
Resumo	In previous papers we have been discussing the modification on the damping of spin waves in ferromagnetic semiconductors and metals under a constant electric and metals under a constant electric field and in the field of an electromagnetic wave. The model we consider for a magnetic semiconductor and metal is that of a conduction-electron-localized moment interacting system.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 7, Times Cited: 1
Área	FISMAT
Afiliação	Universidade Federal de Pernambuco, Instituto de Física de Física

art. 19

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Nonlinear excitation of density fluctuations in electron-magnon systems
Revista	Physical Review B
Mês	Dec.
Ano	1975
Volume	12
Número	11
Páginas	5075-5080
Palavras-Chave	semiconductors, Magnons
Resumo	A nonlinear mechanism is suggested for exciting electron-magnon density fluctuation by means of a long-wavelength radiation field in doped magnetic semiconductors. A calculation of the threshold field for this phenomenon is presented in the microwave-frequency region.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 23, Times Cited: 9
Área	FISMAT
Afiliação	Departamento de Fisica, Universidade Federal de Pernambuco

art. 20

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Screening effect on the spin wave amplification in ferromagnetic semiconductors
Revista	Solid State Communications
Mês	Apr.
Ano	1975
Volume	16
Número	8
Páginas	973-975
Palavras-Chave	Ferromagnetic materials, Semiconductors, Carbon, Adsorption
Resumo	Adsorption of Sevin and Baygon on granular activated carbon was investigated. Adsorption parameters of Freundlich and Langmuir isotherms are useful indications of the adsorption capacity of carbon and the anticipated sharpness of break-through front. Adsorption of tested carbamates depends on their chemical structure and branching of the side chains. Contact time tends to be the most important factor controlling the efficiency of the adsorption process and a linear relationship was obtained between the logarithm of contact time and volume of effluent passing the column before breakthrough of Sevin.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 18, Times Cited: 3
Área	FISMAT
Afiliação	Instituto de Física, Universidade Federal de Pernambuco

art. 21

Tipo da Referência	Journal Article
Autor	Tahir-kheli, R. A. Miranda, L. C. M. Rezende, S. M.
Título	Randomly dilute, molecular-field ferromagnet and antiferromagnet
Revista	Nuovo Cimento Della Societa Italiana di Fisica B: General Physics Relativity Astronomy and Mathematical Physics and Methods
Ano	1975
Volume	30
Número	2
Páginas	335-347
Palavras-Chave	Magnetic fields, Magnetization, Ferromagnetic materials, Semiconductors
Resumo	We have evaluated the effect of the interaction of the carrier spin with the self-consistent magnetic field created by the oscillations od the magnetizations in ferromagnetic semiconductors. Under the experimental conditions in CdCr2Se4 the contribution of this interaction to the process of spin wave amplification is negligible compared with the current interacion. It is also shown that it becomes dominant only for large values of K.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 25, Times Cited:6
Área	FISMAT
Afiliação	TEMPLE University, Dept. Phys. Phys., Philadephia

art. 22

Tipo da Referência	Journal Article
Autor	Amato, M. A. Miranda, L. C. M.
Título	Effect of laser-cyclotron resonance on the Landau damping of plasma waves
Revista	Physical Review A
Mês	Aug.
Ano	1976
Volume	14
Número	2
Páginas	877-879
Palavras-Chave	Plasmons, laser, magnetic fields
Resumo	The plasmon scattering by electrons in the simultaneous presence of laser and magnetic fields is discussed. A kinetic equation is derived, and the rate of change of the plasmon population is calculated. For laser radiation propagating parallel to the magnetic field it is found that multiphoton processes are dominant when the laser frequency is near the electron cyclotron frequency. Furthermore, the damping rate is found to decrease exponentially as the laser frequency approaches the electron cyclotron frequency.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 8, Times cited: 10
Área	FISMAT
Afiliação	Departamento de Física, Universidade de Brasília

art. 23

Tipo da Referência	Journal Article
Autor	Amato, M. A. Miranda, L. C. M.
Título	Electromagnetic generation of acoustic phonons in semiconductors under strong magnetic-field
Revista	Physics Letters A
Mês	June
Ano	1976
Volume	57
Número	4
Páginas	365-366
Palavras-Chave	Semiconductors, Acoustic waves, Phonons
Resumo	In recent years there has been a number of papers devoted to the excitation of acoustic waves by r.f. electromagnetic radiation in metals and semiconductors. In particular, it has been discussed in the carrier contribution to the phonon generation due to the transfer to the lattice of momentum gained from the radiation field by the electrons via the process photon + carrier ® phonon + carrier. On the other hand, it is natural to expect that external fields changing the spectrum and the occupation numbers of the electron states will considerably modify the spectrum and damping of the acoustic waves. This therefore leads us to consider the question of how the carrier-assisted electromagnetic generation of acoustic waves may be affected by the presence of a strong magnetic field.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:11 , Times Cited:2
Área	FISMAT
Afiliação	Departamento de física, Universidade de Brasília

art. 24

Tipo da Referência	Journal Article
Autor	Brandi, H. S. Santos, R. R. Miranda, L. C. M.
Título	Hydrogen - atoms in strong magnetic-field-oscillator-strengths
Revista	Lettere al Nuevo Cimento
Ano	1976
Volume	16
Número	6
Páginas	187-192
Palavras-Chave	hydrogen, magnetic fields
Resumo	In a previous paper a new scheme has been proposed for the wave functions of hydrogen atoms in strong magnetic fields. The advantages of this new scheme are, for instance, the fast convergence for a small set of basic functions, a somewhat smaller ground-state energy as compared with the ones previously published, and a labeling of the energy states closely related to that of the hydrogen atoms in the absence of a magnetic field.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 8, Times Cited: 9
Área	FISMAT
Afiliação	Pontifícia Universidade Católica, Departmento de Física, Rio de Janeiro University Arizona, Dept. Phys., Tucson Departamento de Física, Universidade de Brsília

art. 25

Tipo da Referência	Journal Article
Autor	Coutinho, S. G. Miranda, L. C. M.
Título	Light scattering from magnons in ferromagnetic semiconductors
Revista	Solid State Communications
Ano	1976
Volume	18
Número	7
Páginas	785-788
Palavras-Chave	Photons, Raman scattering, Magnons, Loudon's spin-orbit
Resumo	The effect of the electron-magnon interaction on the Raman scattering by magnons is discussed. It is shown that in addition to Loudon's spin-orbit coupling mechanism there is another, carrier-mediated, contribution to the Raman line. The frequency dependence of the resonant scattering is discussed and application to CdCr2Se4 is made.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 17, Times Cited: 3
Área	FISMAT
Afiliação	Departamento de Fisica, Universidade Federal de Pernambuco Department of Physics, University of Arizona Departamento de Fisica, Universitade de Brasilia

art. 26

Tipo da Referência	Journal Article
Autor	Gama, A. A. S. D. Miranda, L. C. M. Ferreira, R.
Título	Note electro-optic effects
Revista	Chemical physics Letters
Ano	1976
Volume	40
Número	2
Páginas	271-274
Palavras-Chave	Electrooptical effects
Resumo	Timoco's case of second-order effect in isotropic fluids is discussed for the very high electric fields. The possibility of observing a linear electro-optic effect in oriented molecules of certain symmetry types is also analyzed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 11, Times Cited: 0
Área	FISMAT
Afiliação	Departmento de Física, Universidade Federal de Pernambuco, Departmento de Física, Pontifícia Universidade Católica, Departmento de Física, Universidade de Brasília

art. 27

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	Plasmon-assisted sound amplification in semi-conductors under strong
Revista	Physics Letters A
Mês	June
Ano	1976
Volume	57
Número	4
Páginas	385-386
Palavras-Chave	Piezoelectricity, Semiconductors, Phonons, Plasmon
Resumo	We derive an expression for the contribution from plasma effects to the sound amplification in piezo-electric semiconductors subjected to a strong d.c. magnetic field applied parallel to the drift field. It is shown that this contribution largely differs from that in the absence of a magnetic field both in the strength of the effect and in angular distribution of the emitted phonons.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 11, Times Cited: 0
Área	FISMAT
Afiliação	Departamento de Fisica, Universidade de Brasilia

art. 28

Tipo da Referência	Journal Article
Autor	Melo, C. P. Ferreira, R. Brandi, H. S. Miranda, L. C. M.
Título	Hydrogen Molecule Ion in Strong Magnetic Fields
Revista	Physical Review Letters
Mês	Sep.
Ano	1976
Volume	37
Número	11
Páginas	676-679
Palavras-Chave	magnetic fields, Hydrogen Molecules
Resumo	A variational principle is used to determine the binding energy and the fundamental vibrational frequency of H+2 in the presence of magnetic fields of strengths found in some neutron stars. It is shown that for B~1012 G the vibrational frequency lies in the ultraviolet or soft-x-ray part of the spectrum.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Departmento de Física, Universidade Federal de Pernambuco, Departmento de Física, Pontifícia Universidade Católica, Departmento de Física, Universidade de Brasília
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 30
Área	FISMAT
Afiliação	Departmento de Física, Universidade Federal de Pernambuco Departmento de Física, Pontifícia Universidade Católica Departmento de Física, Universidade de Brasília

art. 29

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Magnon dispersion in ferromagnetic semiconductors and metals under strong fields
Revista	Physical Review B
Mês	Apr.
Ano	1976
Volume	13
Número	7
Páginas	3180-3183
Palavras-Chave	magnetic fields, magnons, ferromagnetic materials, semiconductors
Resumo	The effect of strong magnetic fields on the magnon energy renormalization in an electron-magnon system is discussed. It is shown that under strong fields the magnon dispersion as well as the indirect exchange become anisotropic.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 17, Times Cited: 3
Área	FISMAT
Afiliação	Department of Physics, University of Arizona Departamento de Física, Universidade de Brasília

art. 30

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Multiphoton dissociation of diatomic molecules at high intensities
Revista	Physics Letters A
Mês	Apr.
Ano	1976
Volume	56
Número	5
Páginas	374-376
Palavras-Chave	Diatomic molecules
Resumo	A non-perturbative method is used to obtain an analytic expression for the rate of multiphoton dissociation of diatomic molecules as a function of the incident radiation. The two-photon dissociation process is considered as an example.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 9, Times Cited: 4
Área	FISMAT
Afiliação	Department of Physics, University of Arizona, Tucson, Arizona Departamento de Física, Universidade de Brasilia

art. 31

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Phonon damping in the simultaneous presence of intense radiation and magnetic fields
Revista	Journal of Physics C Solid State Physics
Mês	Aug.
Ano	1976
Volume	9
Número	15
Páginas	2971-2976
Palavras-Chave	Phonon scattering, laser, magnetic fields
Resumo	Phonon scattering by electrons in the simultaneous presence of intense laser and magnetic fields is discussed. A kinetic equation is derived, and the rate of change of the phonon population is calculated. For laser radiation propagating parallel to the magnetic field, it is found that multiphoton processes are dominant when the laser frequency is near the electron cyclotron frequency. Furthermore, the damping rate is found to decrease as the laser frequency approaches the electron cyclotron frequency.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Departamento de Fisica, Universidade de Brasilia, Brasilia, Brazil
Tertiary Type	E WEBSCI: Cited Reference: 14, Times Cited: 27
Área	FISMAT
Afiliação	Departamento de Fisica, Universidade de Brasilia

art. 32

Tipo da Referência	Journal Article
Autor	Amato, M. A. Miranda, L. C. M.
Título	Plasma-wave instability in field of an intense electromagnetic wave
Revista	Physics of Fluids
Mês	June
Ano	1977
Volume	20
Número	6
Páginas	1031-1032
Palavras-Chave	plasmon scattering, laser, Plasma waves
Resumo	The plasmon scattering by electrons in the presence of an intense laser field is discussed. It is shown that in the strong field limit the plasmon population may become unstable.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:7 , Times Cited:4
Área	FISMAT
Afiliação	Universidade de Brasília, Departamento de Física Universidade Estadual de Campinas, Instituto de Física

art. 33

Tipo da Referência	Journal Article
Autor	Coutinho, S. G. Miranda, L. C. M.
Título	Magnon instability in ferromagnetic semiconductors under an intense electromagnetic-field
Revista	Physical Review B
Mês	Feb.
Ano	1977
Volume	15
Número	3
Páginas	1593-1596
Palavras-Chave	magnons, Ferromagnetic materilas, semiconductors
Resumo	The magnon damping in an electron-magnon system in the presence of an electromagnetic wave is discussed. It is found that in the strong-field limit only multiphoton absorption processes are significant and as a result the magnon population grows with time. A numerical estimate of the actual growth rate is given for a typical ferromagnetic semiconductor like CdCr2Se4.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 23, Times Cited: 19
Área	FISMAT
Afiliação	Departmento de Fisica, Universidade Federal de Pernambuco Departamento de Fisica, Universidade de Brasília

art. 34

Tipo da Referência	Journal Article
Autor	Ferreira, P. R. R. Miranda, L. C. M.
Título	Magnon contribution to phonon damping in ferromagnetic semiconductors
Revista	Physica Status SolidI B: Basic Research
Ano	1977
Volume	79
Número	1
Páginas	K49-K52
Palavras-Chave	Magnons, Ferromagnetic materils, Semiconductors, Phonon
Resumo	The objective of the present note is to examine the carrier-assisted magnon contribution in the phonon damping in ferromagnetic semiconductors. As will be shown later on, the ultrasound attenuation may indeed be also used as an alternative tool for investigating the electron-magnon interaction in these materials.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:14 , Times Cited:0
Área	FISMAT
Afiliação	Universidade de Brasília, Departamento de Física Universidade Estadual de Campinas, Instituto de Física

art. 35

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	Plasmon-enhanced sound-amplification in piezoelectric semiconductors under a strong magnetic-field
Revista	Physica Status SolidI B: Basic Research
Ano	1977
Volume	80
Número	1
Páginas	57-62
Palavras-Chave	Magnetic fields, Piezoelectricity ,Semiconductors, Plasmon
Resumo	The effect is considered of a strong dc magnetic field upon the contribution to sound amplification, in piezoelectric semiconductors arising from the energy conversion mechanism "plasmon + + carrier phonon + carrier". An explicit expression is derived for the amplification coefficient. It is shown that under suitable conditions such contribution largely differs from that in the absence of a magnetic field both in the strength of the effect and in the angular distribution of the emitted phonons. A physical interpretation of the results is presented.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:18 , Times Cited:2
Área	FISMAT
Afiliação	Universidade de Brasilia, Departamento de Física

art. 36

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Amplification of high-frequency phonons in the field of an intense electromagnetic wave
Revista	Solid State Communications
Mês	July
Ano	1977
Volume	23
Número	4
Páginas	219-221
Palavras-Chave	Electromagnetic wave, Phonons
Resumo	The phonon damping in an electron-phonon system in the presence of an electromagnetic wave is discussed. It is found that in the strong-field limit only multiphoton absorption processes are significant and as a result the phonon population may grow with time.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 13, Times Cited: 11
Área	FISMAT
Afiliação	Instituto de Física, Universidade Estadual de Campinas

art. 37

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Effect of cyclotron resonance on the indirect exchange between localized magnetic moments
Revista	Solid State Communications
Mês	Apr.
Ano	1977
Volume	22
Número	2
Páginas	103-106
Palavras-Chave	Magnons, Spin wave dispersion equation
Resumo	The effect of the simultaneous presence of an electromagnetic and a D.C. magnetic field on the magnon dispersion relation is discussed within the s-d-model. It is found that as the radiation frequency approaches the electron cyclotron frequency there is a quenching of the carrier contribution to the spin wave dispersion equation.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 17, Times Cited: 1
Área	FISMAT
Afiliação	Departamento de Física do Estado Sólido e Ciência dos Materiais, Instituto de Física "Gleb Wataghin

art. 38

Tipo da Referência	Journal Article
Autor	Pereira, P. R. R. Amato, M. A. Miranda, L. C. M.
Título	Carrier-assisted radiation pumping of spin-waves in ferromagnetic semiconductors under strong magnetic-field
Revista	Physica Status SolidI B: Basic Research
Ano	1977
Volume	81
Número	1
Páginas	395-401
Palavras-Chave	Ferromagnetic materials, Semiconductors, Spin waves
Resumo	The carrier contribution to the generation of spin waves in ferromagnetic semiconductors under the simultaneous presence of a laser field and a strong dc magnetic field is discussed. It is shown that for degenerate semiconductors this electronic contribution predicts a threshold pumping power within the experimental reach. Also, this carrier-assisted mechanism excites spin waves in a broad range of relatively high valves of q and may be useful as a new tool for investigating the s-d exchange constant.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:25 , Times Cited:2
Área	FISMAT
Afiliação	Universidade de Brasília, Departamento de Física

art. 39

Tipo da Referência	Journal Article
Autor	Pereira, P. R. R. Miranda, L. C. M.
Título	Magnon damping in ferromagnetic semiconductors under intense radiation and magnetic fields
Revista	Physical Review B
Mês	May
Ano	1977
Volume	15
Número	9
Páginas	4540-4543
Palavras-Chave	Magnon scattering, Radiation, Magnetic fields, Polarized radiation
Resumo	The magnon scattering by electrons in the simultaneous presence of radiation and magnetic fields is discussed. A kinetic equation is derived, and the rate of change of the magnon population is calculated. For circularly polarized radiation propagating parallel to the magnetic field it is found that multiphoton processes are dominant when the radiation frequency is near the electron cyclotron frequency. Furthermore, the damping rate is found to decrease exponentially as the radiation frequency approaches the electron cyclotron frequency
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 13, Times Cited: 1
Área	FISMAT
Afiliação	Departmento de Física, Universidade de Brasília

art. 40

Tipo da Referência	Journal Article
Autor	Scalabrin, A. Porto, S. P. S. Vargas, H. Lima, C. A. S. Miranda, L. C. M.
Título	Temperature dependence of the broad A1 (TO) phonon Raman linewidth in BaTiO3
Revista	Solid State Communications
Mês	Oct.
Ano	1977
Volume	24
Número	4
Páginas	291-294
Palavras-Chave	Temperature, Ferroelectricity
Resumo	The temperature dependence of the A1 (TO) broad phonon linewidth is discussed. It is shown that it can adequately be accounted for by assuming a simple model where the Ti ions are sitting off the center of the unit cell and tunneling through a double well in the direction of the ferroelectric axis. Résumé: On discute la dépendence en température de la largeur de la raie du phonon A1 (TO). On montre que ce phenomène peut être bien expliqué par un modèle simple, où les ions de Ti sont localisés hors du centre de la cellule unitaire et franchissent par effect tunnel un puits double dans la direction de l'axe ferroélectrique.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 16
Área	FISMAT
Afiliação	Instituto de Física "Gleb Wataghin"

art. 41

Tipo da Referência	Journal Article
Autor	Tenan, M A Miranda, L. C. M.
Título	On the intensity of electronic and vibrational resonant Raman scattering
Revista	Journal of Physics C: Solid State Physics
Mês	July
Ano	1977
Volume	10
Número	14
Páginas	L389-L393
Palavras-Chave	Raman scattering
Resumo	A discussion of the relative Raman intensities based upon the simple, harmonic single coordinate model for the scattering centre is presented. It is shown that near resonance and for a strong electron-phonon coupling the Raman intensity as a function of the vibrational quantum number may exhibit a maximum.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:15 , Times Cited: 2
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade Estadual de Campinas

art. 42

Tipo da Referência	Journal Article
Autor	Tenan, M. A. Miranda, L. C. M.
Título	On the thermoelectric amplification of magnons in ferromagnetic semiconductors
Revista	Physics Letters A
Mês	Nov.
Ano	1977
Volume	63
Número	3
Páginas	369-370
Palavras-Chave	Magnons, Ferromagnetic materials, Semiconductors
Resumo	The damping coefficient of magnons interacting with carriers in ferromagnetic semiconductors subjected to a temperature gradient is calculated. It is shown that the spin waves may be amplified by the carriers when the temperature gradient exceeds a critical value.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 0
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade Estadual de Campinas

art. 43

Tipo da Referência	Journal Article
Autor	Almeida, N. S. Miranda, L. C. M.
Título	Light scattering from magnons in ferromagnetic semiconductors under strong fields
Revista	Solid State Communications
Mês	July
Ano	1978
Volume	27
Número	1
Páginas	11-16
Palavras-Chave	Raman scattering, Magnons, Ferromagnetic materials, Semiconductors
Resumo	The effect of the electron-magnon interaction on the Raman scattering by magnons under strong magnetic fields is discussed. It is shown that in addition to Loudon's spin-orbit coupling mechanism there is another, carrier-mediated, intraband resonant contribution to the Raman line. The angular dependence of this resonant scattering is discussed and application to CdCr2Se4 is made.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Departamento de Física, Universidade Federal do Rio Grande do Norte (UFRN), Instituto de Física "Gleb Wataghin" (UNICAMP)
Tertiary Type	E WEBSCI: Cited Reference: 20, Times Cited: 1
Área	FISMAT
Afiliação	Departamento de Física, Universidade Federal do Rio Grande do Norte Instituto de Física "Gleb Wataghin"

art. 44

Tipo da Referência	Journal Article
Autor	Brandi, H. S. Koiller, B. Lins de Barros, H. G. P. Miranda, L. C. M. Castro, J. J.
Título	Theory of electron-hydrogen-atom collisions in the presence of a laser field
Revista	Physical Review A
Mês	June
Ano	1978
Volume	17
Número	6
Páginas	1900-1906
Palavras-Chave	Multiphoton processes, Collisions, Hydrogen, Atom, Scattering
Resumo	Expressions for the scattering amplitude of multiphoton processes occurring during the collision of electrons with a hydrogen atom in the presence of an electromagnetic field have been obtained in several approximations: the momentum translation, the space translation, and the Keldysh approximation for the bound-electron wave function. We also propose a perturbation approach based on the space-translation approximation to treat the hydrogen-atom bound states. Our results show that it is of fundamental importance to consider the modifications of bound states due to the presence of the field.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 21, Times Cited:31
Área	FISMAT
Afiliação	Departamento de Física, Pontificia Universidade Católica Centro Brasileiro de Pesquisas Físicas, Instituto de Física, Universidade Estadual de Campinas

art. 45

Tipo da Referência	Journal Article
Autor	Brandi, H. S. Koiller, B. Lins de Barros, H. G. P. Miranda, L. C. M.
Título	Charged-particles scattering in the presence of a homogeneous magnetic field
Revista	Physical Review A
Mês	Oct.
Ano	1978
Volume	18
Número	4
Páginas	1415-1419
Palavras-Chave	Magnetic field, Coulomb , High field
Resumo	We study the scattering of charged particles in the presence of a homogeneous magnetic field. Using the Green's function formalism, an appropriate transition amplitude for the scattering process is defined, and application is made on scattering by a Coulomb potential in the high-energy approximation. For this case, the transition amplitude is obtained in a closed form; its behavior with the magnetic field intensity and initial translational energy is qualitatively discussed for transitions from the first Landau level. In the ultrastrong-field limit, the total transition probability presents periodic threshold structures with increasing values of the initial translational energy.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Departamento de Física, Pontifícia Universidade Católica, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Instituto de Física, Universidade Estadual de Campinas
Tertiary Type	E WEBSCI: Cited Reference: 20, Times Cited: 12
Área	FISMAT
Afiliação	Departamento de Física, Pontifícia Universidade Católica Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro Instituto de Física, Universidade Estadual de Campinas

art. 46

Tipo da Referência	Journal Article
Autor	Brandi, H. S. Koiller, Belita Lins de Barros, H. G. P. Miranda, L. C. M.
Título	Inert gas atom-molecule collisions in a laser field: vibrational excitations in homopolar molecular ions
Revista	The Journal of Chemical Physics
Mês	Aug.
Ano	1978
Volume	69
Número	3
Páginas	1096-1100
Palavras-Chave	Electromagnetic fields, Diatomic molecules, Vibrations, Gas atoms
Resumo	We investigate the effect of an electromagnetic field in the vibrational excitations of diatomic molecules, considering its collisions with noble gas atoms. Considering colinear collisions we obtain an expression for the vibrational transition amplitudes, and we apply the formalism to the specific collision He+H in CO2 laser field, in the high energy approximation. The general behavior of the multiphoton transition amplitude as a function of the relevant parameters of the system is discussed for the 01 vibrational excitation.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited reference:27, Times Cited: 4
Área	FISMAT
Grupo	{Departamento de Física, Pontifícia Universidade Católica} {Centro Brasileiro de Pesquisas Físicas} {Instituto de Física, Universidade Estadual de Campinas}

art. 47

Tipo da Referência	Journal Article
Autor	Ghizoni, C. C. Siqueira, M. A. A. Vargas, H. Miranda, L. C. M.
Título	On the use of photoacoustic cell for investigating the electron-phonon interaction in semiconductors
Revista	Applied Physics Letters
Ano	1978
Volume	32
Número	9
Páginas	554-556
Palavras-Chave	Photoacoustic cell, Semiconductors, Transport properties, Crrystals, Phonons
Resumo	By exploring the simple periodic heat-flow principle of the photoacoustic cell we demonstrate experimentally the usefulness of the acoustic cell for studying the transport properties of semiconductors.An interesting feature of this technique is that it allows us to separate the different sources of sound generation in a semiconductor. Specific application is made for the case of Si crystals submitted to rectangular voltage pulses.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: Times Cited: 27
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Pesquisas Espaciais Instituto de Física, Universidade Estadual de Campinas

art. 48

Tipo da Referência	Journal Article
Autor	Gualberto, G. M. Tenan, M. A. Vargas, H. Miranda, L. C. M. Pelzl, J.
Título	Resonant Raman effect of O-3 in gamma -irradiated Ba(CLO3)2H2O and AgCLO3
Revista	Physical Review B
Mês	Jan.
Ano	1978
Volume	17
Número	2
Páginas	919-923
Palavras-Chave	Resonant virbational, Raman measurements
Resumo	Resonant virbational Raman measurements of O-3 in gamma -irradiated Ba(ClO3)2H2O and AgClO3 are reported. It is concluded that the O-3 ions occupy two nonequivalent sites in the lattice. A simple model describing the unusual relative Raman intensities is also presented.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 18, Times Cited: 4
Área	FISMAT
Afiliação	Instituto de Física, Universidade Estadual de Campinas Institut für Experimentalphysik VI, Ruhr-Universität

art. 49

Tipo da Referência	Journal Article
Autor	Lima, M B S Miranda, L. C. M.
Título	Coulomb screening in the presence of two electromagnetic waves
Revista	Journal of Physics C: Solid State Physics
Mês	Oct.
Ano	1978
Volume	11
Número	20
Páginas	L843-L846
Palavras-Chave	static dielectric, Coulomb, Electromagnetic waves
Resumo	The effective static dielectric constant of an electron plasma in the presence of two electromagnetic waves is discussed. It is found that the potential distribution created by a point charge in such a system is anisotropic, dies off by power laws, and is enhanced when the difference of the two electromagnetic wave frequencies matches the plasma frequency.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 16, Times Cited:4
Área	FISMAT
Afiliação	Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas

art. 50

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M. Vargas, H. Porto, S. P. S.
Título	Temperature behavior of dielectric-constant of tetragonal BaTiO3
Revista	Physica Status Solid B: Basic Research
Ano	1978
Volume	86
Número	1
Páginas	373-378
Palavras-Chave	Dielectric constant, Temperature, Phonons
Resumo	A model is developed which assumes the temperature dependence of the dielectric constant of BaTiO3, along the ferroelectric axis in the tetragonal phase to be essentially determined by a relaxation mechanism involving dipole reorientation controled by tunneling across a double well potential barrier. Model parameters are determined from fits to existing data and it is shown that the fitted curves adjust well to the data within experimental error. The results support the hypothesis that the ferro-to-paraelectric transition in BaTiO3 is not governed by phonon assisted processes but must be ascribed to an intrinsic type of disorder
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 17, Times Cited:9
Área	FISMAT
Afiliação	Universidade Estadual de Campina, Instituto de Física Watachin

art. 51

Tipo da Referência	Journal Article
Autor	Luzzi, R. Miranda, L. C. M.
Título	Optical-properties of semiconductors under intense laser fields
Revista	Physics Reports: Section C of Physics Letters
Ano	1978
Volume	43
Número	11
Páginas	423-453
Palavras-Chave	Optical properties, semiconductors
Resumo	Recent progress is reviewed in the investigation of optical responses from highly photo-excited semiconductor plasma. The theoretical interpretation of the spectroscopy data is outlined on the basis of the coupling of the usual scattering theory with Zubarev's non-equilibrium statistical operator method. Connection with appropriate extension to the non-equilibrium state of the thermodynamic double-time Green functions is also presented.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 129, Times Cited: 29
Área	FISMAT
Afiliação	Universidade Estadual de Campinas, Instituto de Física

art. 52

Tipo da Referência	Journal Article
Autor	Melo, L. C. de Das, T. K. Ferreira, R. C. Miranda, L. C. M.
Título	The H+2 molecule in strong magnetic fields, studied by the method of linear combinations of orbitals
Revista	Journal of Applied Physics
Ano	1978
Volume	18
Número	1
Páginas	12-14
Palavras-Chave	Magnetic fields, Ion, Hydrogen, Molecule, Atom
Resumo	We have studied the ground state of the H+2 molecular ion in the presence of a homogeneous magnetic field, basing this study on a linear combination of atomic orbitals obtained from the hydrogen atom in a magnetic field. The calculations have shown that this scheme is adequate to describe the binding energy of the molecule at field strengths up to approximately 10 10 G.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 10, Times Cited: 26
Área	FISMAT
Afiliação	Departamento de Física, Universidade Federal de Pernambuco, Departamento de Física, Universidade de Brasília, Departmento de Física, Pontificia Universidade Católica

art. 53

Tipo da Referência	Journal Article
Autor	Melo, C. P. Melo, L. C. Das, T. K. Ferreira, R. Brandi, H. S. Miranda, L. C. M.
Título	Molecula de H2 em campos magneticos superintensos
Revista	Química Nova
Mês	abr.
Ano	1978
Volume	1
Páginas	2-10
Palavras-Chave	Atomos, Propriedades, Campos magnéticos superintensos
Resumo	Nos últimos cinco anos cresceu enormemente o interesse dos físicos e astrofísicos pelas propriedades de átomos em campos magnéticos superintensos. Estes são definidos como situados no intervalo 10 8 Gauss maenor igual B menor igual 10 13 Gauss. A razão deste interesse é que foi descoberto que campos magnéticos dessas ordens de grandeza existem em certas classes de estrelas, tais como as anães brancas e, especialmente, as estrelas de neutrons (pulsares). Uma revisão detalhada do problema de átomos em campos magnéticos superintensos apareceu recentemente no Reports on Progress in Physics.
Idioma	Portuguese
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI:
Área	FISMAT
Afiliação	Departamento de Física, Universidade de Pernambuco Departamento de Física , Pontificia Universidade Católica, Rio de Janeiro Instituto de Física, Universidade de Campinas

art. 54

Tipo da Referência	Journal Article
Autor	Skeff Neto, K Cunha Lima, I C Almeida, N S Miranda, L. C. M.
Título	On the high-temperature behaviour of magnetically ordered microcrystals
Revista	Journal of Physics C: Solid State Physics
Mês	Aug.
Ano	1978
Volume	11
Número	16
Páginas	L695-L700
Palavras-Chave	High temperature, Microcrystals
Resumo	A simple molecular-field model taking into account the characteristic volume distribution of an assembly of magnetically ordered microcrystals is developed to explain the observed high-temperature behaviour of the magnetisation. It is also shown that the volume distribution implies a distribution of critical temperatures.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:14 , Times Cited:2
Área	FISMAT
Grupo	LAS
Afiliação	Departamento de Fisica, Universidade de Brasilia, Brasilia Departamento de Engenharia Espacial, Instituto de Pesquisas Espaciais Instituto de Física, Universidade Estadual de Campinas

art. 55

Tipo da Referência	Journal Article
Autor	Skeff Neto, K. Miranda, L. C. M.
Título	Magnetic properties of FeOHSO4- I. Mössbauer spectroscopy
Revista	Solid State Communications
Mês	Oct.
Ano	1978
Volume	28
Número	1
Páginas	43-48
Palavras-Chave	Mössbauer spectroscopy, Magnetic properties
Resumo	Mössbauer measurements on FeOHSO4 are presented. A new model based upon the molecular-field approximation for randomly dilute magnets is proposed to explain the observed behavior of the internal field as a function of the temperature. Résumé Des mesures d'effet Mössbauer, sur du FeOHSO4 sont présentées. Nous proposons, ici, un nouveau modèle, basé sur l'approximation du champ moléculaire pour des aimants dilués, afin d'expliquer le comportement observé, pour le champ interne, en fonction de la température.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 9, Times Cited: 0
Área	FISMAT
Afiliação	Departamento de Física, Universidade de Brasília Instituto de Física "Gleb Wataghin" (UNICAMP)

art. 56

Tipo da Referência	Journal Article
Autor	Cesar, C. L. Vargas, H. Meyer, J. A. Miranda, L. C. M.
Título	Photoacoustic effect in solids
Revista	Physical Review Letters
Mês	June
Ano	1979
Volume	42
Número	23
Páginas	1570-1573
Palavras-Chave	Photoacoustic
Resumo	A quantitative derivation is presented for the production of the acoustic signal in a photoacoustic cell, taking into account the finite surface thermal resistance of the solid.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI:Cited Reference: 6, Times Cited: 29
Área	FISMAT
Afiliação	Instituto de Física, Universidade Estadual de Campinas

art. 57

Tipo da Referência	Journal Article
Autor	Lima, M. B. S. Lima, C. A. S. Miranda, L. C. M.
Título	Coulomb screening in the simultaneous presence of a radiation field and a strong DC magnetic field
Revista	Journal of Physics C: Solid State Physics
Mês	Nov.
Ano	1979
Volume	12
Número	21
Páginas	4469-4475
Palavras-Chave	Coulomb, Magnetic fields, Electromagnetic waves
Resumo	The effective static dielectric constant of an electron plasma in the simultaneous presence of an electromagnetic wave and a uniform DC magnetic field is discussed. It is found that as the radiation field frequency approaches the plasma frequency a breakdown in screening occurs. As the radiation frequency approaches the electron cyclotron frequency, however, the potential of a static charge felt by the electrons becomes vanishingly small.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 22 , Times Cited:0
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade Estadual de Campinas

art. 58

Tipo da Referência	Journal Article
Autor	Lima, M. B. S. Lima, C. A. S. Miranda, L. C. M.
Título	Screening effect on the plasma heating by inverse bremsstrahlung
Revista	Physical Review A
Mês	Apr.
Ano	1979
Volume	19
Número	4
Páginas	1796-1800
Palavras-Chave	Coulomb, Plasma heating, Screening effect
Resumo	The effect of Coulomb screening on the inverse-bremsstrahlung heating process in a plasma illuminated by a laser beam is discussed. It is shown that, although the screening effect actually lowers the electron-nuclei interaction, a situation may arise, namely, when the laser frequency approaches the plasma frequency, in which an enhancement of the collisional plasma heating can be expected.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 16, Times Cited: 14
Área	FISMAT
Afiliação	Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas

art. 59

Tipo da Referência	Journal Article
Autor	Lima, M. B. S. Miranda, L. C. M.
Título	Phonon instability in the presence of two radiation fields
Revista	Journal of Physics C: Solid State Physics
Mês	Feb.
Ano	1979
Volume	12
Número	4
Páginas	L145-L149
Palavras-Chave	Acoustics, Scattering, Phonons
Resumo	The rate of change in the acoustic phonon population due to scattering by conduction electrons in the presence of two laser fields is calculated. It is found that longitudinal acoustic waves propagating parallel to the direction of polarisation of the radiation fields may be amplified over a relatively narrow frequency range.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:14 , Times Cited:0
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade. Estadual de Campinas

art. 60

Tipo da Referência	Journal Article
Autor	Tenan, M. A. Marotta, A. Miranda, L. C. M.
Título	On the thermoelectric amplification of sound in semiconductors
Revista	Applied Physics Letters
Mês	Aug.
Ano	1979
Volume	35
Número	4
Páginas	321-323
Palavras-Chave	Thermoelectric effects, semiconductors
Resumo	The possibility of sound amplification in a semiconductor subjected to an external temperature gradient is discussed. It is shown that for kl << 1 and short-circuited samples, the temperature gradient threshold for amplification varies inversely proportional to (kl)2.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference:12, Times Cited: 3
Área	FISMAT
Afiliação	Instituto de Física "Gleb Wataghin, Universidade Estadual de Campina

art. 61

Tipo da Referência	Journal Article
Autor	Galembeck, F. Ghizoni, C. C. Ribeiro, C. A. Vargas, H. Miranda, L. C. M.
Título	Characterization of a new composite-material - Fe2O3-impregnated poly(tetrafluoroethylene) - particle-size determination and photoacoustic-spectroscopy
Revista	Journal of Applied Polymer Science
Ano	1980
Volume	25
Número	7
Páginas	1427-1433
Palavras-Chave	Iron, Composite materials, Photoacoustic spectroscopy
Resumo	Iron carbonyl sorption in PTFE, followed by in situ oxidation, gives the composite material, iron oxide-PTFE. Oxide particle size determination was performed by electron microscopy. The particles were found to be nearly spherical and very small, having diameters in the 30-40 a range overage. Optical absorption spectra were obtained by photoacoustic spectroscopy, and their intensities show a complex dependence on iron oxide concentration in the samples.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 18, Times Cited:12
Área	FISMAT
Grupo	LAS
Afiliação	Universidade de São Paulo, Instituto de Química Universidade Estadual de Campinas, Instituto de Física Instituto de Pesquisas Espaciais

art. 62

Tipo da Referência	Journal Article
Autor	Galembeck, F. Leite, N. F. Miranda, L. C. M. Rechenberg, H. R. Vargas, H.
Título	An EPR and mossbauer study of ultrafine iron (III) oxide particles in polytetrafluorethylene (PTEE) matrix
Revista	Physica Status Solidi A : Applied Research
Ano	1980
Volume	60
Número	1
Páginas	63-68
Palavras-Chave	Mössbauer spectroscopy, Polytetrafluorethylen, Iron
Resumo	A novel method for the preparation of ultrafine Fe203 particles in a polymeric (PTFE) matrix is described. Mossbauer spectra allow the particles to be identified as a-Fe2O3 showing superparamagnetic behavior at room temperature. Electron paramagnetic resonance is investigated between liquid nitrogen and room temperatures. The resonance linewidth is found to be independent of temperature, and approximately inversely proportional to the particles volume (as determined by electron microscopy). The results indicate a strong size dependence of the anisotropy constant K. On décrit une nouvelle méthode pour la préparation de grains ultrafins de Fe2O3 dans une matrice polymérique (PTFE). Les spectra Mossbauer permettent d'identifier les grains comme du a-Fe2O3; ils sont superparamagnétiques à la température ambiante. Nons avons étudié la résonance paramagnétique électronique entre les températures de Yazote liquide et Fambiante. La largeur des raises est indépendante de la température, et inversement proportionelle au volume des grains (mesuré par microscopic électronique). Nos résultats indiquent une forte dépendence volumétrique de la constante d'anisotropie K.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 20, Times Cited:14
Área	FISMAT
Afiliação	Universidade de São Paulo, Instituto de Química Universidade Estadual de Campinas, Instituto de Física Universidade de São Paulo, Instituto de Física

art. 63

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	On the photoacoustic effect of solids: Influence of surface thermal resistance and surface optical absorption
Revista	Physics Letters A
Mês	Sep.
Ano	1980
Volume	79
Número	2-3
Páginas	215-217
Palavras-Chave	Photoacoustic effect, Surfaces, Optical adsorption, Surface
Resumo	A theory is presented for the photoacoustic signal of a solid, which acknowledges two kinds of solid-gas interface phenomena, viz. surface thermal resistance and surface optical adsorption.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 9, Times Cited: 1
Área	FISMAT
Afiliação	Departamento de Física, Universidade de Brasília

art. 64

Tipo da Referência	Journal Article
Autor	Santos, R. Miranda, L. C. M.
Título	Photoacoustic effect in solid-influence of heat-loss
Revista	Applied Optics
Ano	1980
Volume	19
Número	15
Páginas	2551-2555
Palavras-Chave	Photoacoustic effect
Resumo	The effectes of taking into account the loss on the production of the photoacoustic signal are presented. A comparison with the previous results is also made.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 15, Times Cited: 3
Área	FISMAT
Afiliação	Instituto de Atividades Espaciais, Divisão de Estudos Avançados, Centro Técnico Aeroespacial

art. 65

Tipo da Referência	Journal Article
Autor	Siqueira, M. A. A. Ghizoni, C. C. Vargas, J. I. Menezes, E. A. Vargas, H. Miranda, L. C. M.
Título	On the use of the photoacoustic effect for investigating phase-transitions in solids
Revista	Journal of Applied Physics
Mês	Mar.
Ano	1980
Volume	51
Número	3
Páginas	1403-1406
Palavras-Chave	Photoacoustic effect, Phase transitions
Resumo	By exploring the dependence of the photoacoustic signal on the thermal properties of the sample, we demonstrate experimentally the usefulness of the photoacoustic effect for investigating phase transitions in solids. Special application is made for the case of Al-doped VO2. We also describe the photoacoustic cell utilized and the complete characterization of the cell is done by using a piece of germanium in single-crystal form which has well known thermal properties.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 13, Times Cited: 35
Área	FISMAT
Grupo	ETE
Afiliação	Departamento de Engenharia Espacial, Instituto de Pesquisas Espaciais Departamento de Qúmica, Universidade Federal de Minas Gerais Instituto de Física, Universidade Estadual de Campinas

art. 66

Tipo da Referência	Journal Article
Autor	Almeida, N. S. Miranda, L. C. M.
Título	Influence of direct transitions between spin branches on free-carrier absorption of ferromagnetic semiconductors
Revista	Physics Letters A
Mês	Jan.
Ano	1981
Volume	81
Número	1
Páginas	78-80
Palavras-Chave	Absorption coefficients, Ferromagnetic materials, Semiconductors, Spin-flip
Resumo	The direct spin-flip intraband absorption coefficient due to transitions of conduction electrons between the spin branches in degenerate ferromagnetic semiconductors is calculated. It is shown that the absorption coefficient consists essentially of a sharp peak at the band splitting frequency which shifts towards low frequencies as the temperature increases from T = 0 K.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 10, Times Cited: 1
Área	FISMAT
Afiliação	Universidade Federal do Rio Grande do Norte, Departamento de Física Universidade de Brasília, Departamento de Fíisica

art. 67

Tipo da Referência	Journal Article
Autor	Arguello, Z. P. Bilac, S. A. Cisneros, J. L. Tomyiama, M. Donoso, P. Miranda, L. C. M.
Título	On the color variation of a calcium aluminate glass
Revista	Glass Technology
Ano	1981
Volume	22
Número	4
Páginas	186-189
Palavras-Chave	Colour variation, Calcium aluminate glass
Resumo	A detailed investigation of the colour variation of a calcium aluminate glass (40.8 Al2O3, 49 CaO, 6.1SiO2, 4.1MgO is presented. It is proposed that the main centre responsible for the observed colour change from blue change from blue to light green is the formation of O-3 radicals in these glasses due to their exposure to ultraviolet ionising radiation.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 3, Times Cited: 0
Área	FISMAT
Afiliação	Universidade Estadual de Campinas Universidade de Brasília, Departamento de física

art. 68

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	Atoms in superintense laser fields
Revista	Physical Review A
Mês	June
Ano	1981
Volume	23
Número	6
Páginas	3335-3337
Palavras-Chave	Hydrogenlike atom, Bohr radius, Laser field
Resumo	A new calculational ansatz for the quantum problem of a hydrogenlike atom in a nonresonant superintense laser field is presented. It is shown that the ground-state energy scales down from the field-free value by the ratio of the Bohr radius to the electron oscillation amplitude in the laser field.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 27
Área	FISMAT
Afiliação	Departamento de Física, Universidade de Brasília

art. 69

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	Hydrogen atom in superintense laser fields: Correction to the ground-state energy
Revista	Physics Letters A
Mês	Nov.
Ano	1981
Volume	86
Número	6-7
Páginas	367-369
Palavras-Chave	Hydrogen, Atom , Ground-state energy,
Resumo	The higher-order corrections to the ground-state energy of a laser-dressed hydrogen atom are discussed. It is shown that, to first order, the energy correction amounts only to 11% of the zeroth-order result.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 4, Times Cited: 10
Área	FISMAT
Afiliação	Instituto de Física, Universidade Estadual de Campinas Divisão de Estudos Avançados, Centro Técnico Aeroespacial (CTA)

art. 70

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M. Santos, R.
Título	Sample-gas thermal contact resistance and the photoacoustic signal generation
Revista	Journal of Applied Physics
Mês	Jan.
Ano	1981
Volume	52
Número	1
Páginas	137-140
Palavras-Chave	Heat transfer, Photoacoustic effect
Resumo	By invoking long standing results from studies on heat transfer across a two-media interface, the claim for the non-negligeable character of the effects of the solid-gas thermal contact resistance on the photoacoustic signals is amply discussed. Existing experimental evidences are presented which result in strong support forsuch a claim.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 17, times Cited: 7
Área	FISMAT
Afiliação	Departamento de Física, Universidade de Brasília Divisão de Estudos Avançados, Instituto de Atividades Espaciais, Centro Técnico Aeroespacial

art. 71

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	On the multiphoton emission during UV and X-ray absorption by atoms intense laser fields
Revista	Physics Letters A
Mês	Nov.
Ano	1981
Volume	86
Número	6-7
Páginas	363-366
Palavras-Chave	Absorption, Hydrogen, Atoms, Laser fields
Resumo	A discussion of the UV and X-ray absorption cross section by a hydrogen atom in the presence of an intense i.r. laser field is presented, taking into account the influence of the laser field on the electronic states.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 6, Times Cited: 8
Área	FISMAT
Afiliação	Divisão de Estudos Avançados, Centro Técnico Aeroespacial

art. 72

Tipo da Referência	Journal Article
Autor	Nunes, O. A. C. Miranda, L. C. M. Tenan, M. A.
Título	L 0 - phonon instability in the free-carrier absorption in semiconductors under strong magnetic fields
Revista	Solid State Communications
Mês	July
Ano	1981
Volume	39
Número	2
Páginas	345-349
Palavras-Chave	Phonons, Magnetic fields, Semiconductors
Resumo	The LO- phonon damping in an electron-phonon system in the presence of a laser beam and a d. c. magnetic field is discussed. It is shown that near the laser-cyclotron resonance, and for the laser beam propagating perpendicularly to the magnetic field the LO-phonon population in a relatively narrow range of K may grow with time.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 1
Área	FISMAT
Afiliação	Departamento de Física Universidade de Brasília Instituto de Física Universidade Estadual de Campinas

art. 73

Tipo da Referência	Journal Article
Autor	Santos, R. Miranda, L. C. M.
Título	Theory of the photothermal radiometry with solids
Revista	Journal of Applied Physics
Mês	June
Ano	1981
Volume	52
Número	6
Páginas	4194-4198
Palavras-Chave	Photothermal effect
Resumo	A quantitative derivation is presented for the production of the photothermal signal in solids. Both the frequency- and time-domain responses are discussed. Typical time response curves are presented and interpreted in terms of the physical processes occurring in the photothermal emission.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 10, Times Cited: 31
Área	FISMAT
Afiliação	Divisão de Estudos Avançados, Centro Técnico Aeroespacial Departamento de Física, Universidade de Brasília

art. 74

Tipo da Referência	Journal Article
Autor	Almeida, N. S. Miranda, L. C. M.
Título	On the space translation method at high laser fields-upper limit intensity
Revista	Optics Communications
Ano	1982
Volume	42
Número	4
Páginas	241-243
Palavras-Chave	Space translation method, Laser fields, High field
Resumo	A detailed discussion on the validity domain of the space translation method using the dipole approximation for the laser field is presented.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 7, Times Cited: 3
Área	FISMAT
Afiliação	Centro Técnico Aeroespacial,Divisão de Física Teórica,Laboratório Estudos Avançados

art. 75

Tipo da Referência	Journal Article
Autor	Landgraf, T. C. Leite, J. R. Almeida, N. S. Miranda, L. C. M. Lima, C. A. S.
Título	Spectrum of hydrogen atoms in intense laser fields
Revista	Physics Letters A
Mês	Nov.
Ano	1982
Volume	92
Número	3
Páginas	131-134
Palavras-Chave	Kramers-Henneberger transformation, Laser fields, Hydrogen, Atom
Resumo	Using the Kramers-Henneberger transformation we discuss the description of the atomic states in the presence of intense laser fields. The theory is presented for the simple case of a hydrogen atom, and a discussion on the range of laser intensities in which the model is valid is also given.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 17
Área	FISMAT
Afiliação	Instituto de Física, Universidade de São Paulo Departamento de Física, Universidade Federal do Rio Grande do Norte Instituto de Física, Universidade Estadual de Campinas Divisão de Física Teórica, Laboratório de Estudos Avançados, Centro Técnico Aeroespacial

art. 76

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Mattos, J. C. V. Penna, A. F. S. Bulow, J. F. W. V. Miranda, L. C. M. Ghizoni, C. C.
Título	Photoacoustic assessment of prospective plant productivity
Revista	Journal Photoacoustics
Ano	1982
Volume	1
Número	1
Páginas	61-74
Palavras-Chave	Photoacoustic spectroscopy, plant productivity
Resumo	We present preliminary evidence that photoacoustic spectroscopy (PAS) can be a very useful complementary tool in assessing plant producitivity at some stage of its development. Experimental support comes from PAS of the red chlorophyl band in green leaves samples when correlated with the rate of eater loss due to spontaneous dehydration. Samples were selected from live plant leaves of both an inbred line (selfed five times) and an open pollinated UR-1 variety of corn grown under controlled conditions and known to have well differentiated crop yields. The analysis of the first experimental results seems to indicate some definite correlation between the data and the plant prospective productivity. This encouraged long term testing of our findings, which are now in progress to check for statistical significance through several plant generations.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E
Área	FISMAT
Grupo	LAS
Afiliação	Departamento de Física, Universidade de Brasília Departamento de Engenharia Agronômica, Universidade de Brasília Instituto de Pesquisas Espaciais

art. 77

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	A note on tunneling in the presence of a superintense laser field
Revista	Solid State Communications
Mês	Feb.
Ano	1982
Volume	41
Número	6
Páginas	465-467
Palavras-Chave	laser fields, Tunneling
Resumo	The influence of a superintense laser field on the transmission probability of a charged particle through a potential barrier is discussed. It is shown that the effect of the intense laser field is to weaken the potential barrier in such a way that its height decreases exponentially with the laser field. The implications to the ferro –– to para - electric phase transition in BaTiO3 under an intense CO2 - laser field is also discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 13, Times Cited: 2
Área	FISMAT
Afiliação	Instituto de Física da Universidade Estadual de Campinas Divisão de Estudos Avançados, Centro Técnico Aeroespacial

art. 78

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Theory of the photoacoustic effect in semiconductors influence of corrier diffusion and recombination
Revista	Applied Optics
Ano	1982
Volume	21
Número	16
Páginas	2923-2928
Palavras-Chave	Photoacoustic effect, Semiconductors
Resumo	A quantitative derivation is presented for the production of the photoacoustic signal in semiconductors, taking into account finite corrier diffusion and recombination times in the solid.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 11, Times Cited: 36
Área	FISMAT
Afiliação	Instituto de Atividades Espaciais, Centro Técnico Aeroespacial

art. 79

Tipo da Referência	Journal Article
Autor	Cesar, C. L. Vargas, H. Mendes Filho, J. Miranda, L. C. M.
Título	Photoacoustic determination of thermal diffusivity of solids: Application to CdS
Revista	Applied Physics Letters
Mês	Sept.
Ano	1983
Volume	43
Número	6
Páginas	555-557
Palavras-Chave	Thermal diffusivity
Resumo	A novel and simple approach, which uses a lateral heating source for the sample, is proposed as an alternative method for the photoacoustic determination of the thermal diffusivity of solids. The method is experimentally tested using a CdS sample.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 9, Times Cited: 32
Área	FISMAT
Afiliação	Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 80

Tipo da Referência	Journal Article
Autor	Galvão, R. M. O. Almeida, N. S. Miranda, L. C. M.
Título	Laser-assisted coulomb-excitation of nuclei
Revista	Lettere al Nuevo Cimento
Ano	1983
Volume	38
Número	10
Páginas	375-380
Palavras-Chave	Coulomb excitation
Resumo	The Coulomb excitation of nuclei in the preence of na intense laser field is conseidered. It is shown that the laser field not only enhances the cross-section, but also allows the excitation od the nuclei to take place even whn the proton energy is smaller than the transition energy of interest.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 9, Times Cited: 0
Área	FISMAT
Afiliação	Divisão de Física, Centro Técnico Aerospacial, Instituto de Estudos Avançados

art. 81

Tipo da Referência	Journal Article
Autor	Galvão, R. M. O. Miranda, L. C. M.
Título	Parametric distortion of the optical-absorption coefficient of semiconductors by an additional infrared laser
Revista	Physical Review B
Mês	Sep.
Ano	1983
Volume	28
Número	6
Páginas	3593-3596
Palavras-Chave	Absorption coefficient,, Optical absorption
Resumo	The distortion of the optical-absorption coefficient of a direct-gap semiconductor is investigated when the semiconductor is subjected to an additional ir laser field. It is shown that, when the ir laser intensity increases, the absorption coefficient develops a tail below the zero-field gap. An application is made for the case of the InSb irradiated by an intense CO2 laser
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 15, Times Cited: 2
Área	FISMAT
Afiliação	Divisão de Física Teórica, Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 82

Tipo da Referência	Journal Article
Autor	Galvão, R M O Miranda, L. C. M.
Título	Quantum-theory of an electron in external fields using unitary transformations
Revista	American Journal of Physics
Ano	1983
Volume	51
Número	8
Páginas	729-733
Palavras-Chave	Hamiltonian mechanics
Resumo	The technique of using unitary transformations to solve quantum-mechanical problems involving nontrivial time-dependent Hamiltonians is discussed. After introducing the basic ideas in simple examples, the technique is used to solve the problem of an electron in crossed magnetic and electric static plus laser (plane wave) field.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 5 , Times Cited:5
Área	FISMAT
Afiliação	Instituto de Estudo Avancados, Centro Tecnico Aerospacial

art. 83

Tipo da Referência	Journal Article
Autor	Ghizoni, C. C. Miranda, L. C. M.
Título	Influence of the carrier diffusion and recombination on the photo-acoustic signal of semiconductors
Revista	IEEE Transactions on Sonics and Ultrasonics
Ano	1983
Volume	30
Número	3
Páginas	227
Palavras-Chave	Optical absorption, photoacoustic, semiconductors, absorption coefficient
Resumo	A model for the photoacoustic signal of semiconductors taking into account the effects of carrier diffusion and recombination is presented and discussed. It is shown that apart from the optical absorption coefficient, the photoacoustic signal exhibits an explicit dependence on the carrier diffusion coefficient and the effective electron-hole recombination time. In particular, it is shown that at low modulation frequencies the photoacoustic signal of an optically opaque sample saturates. The model is experimentally tested for the two cases of n-type InSb and Si samples. The experimental evidencies strongly supports our claim for taking into account the carrier diffusion and recombination effects - when describing the PA signal of semiconductors.
Notas	Resumo
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:0 , Times Cited:0
Área	FISMAT
Afiliação	Centro Técnico Aeroespacial

art. 84

Tipo da Referência	Journal Article
Autor	Lima, M. B. S. Lima, C. A. S. Miranda, L. C. M.
Título	Collisionless cyclotron absorption of photons by electrons in a laser-beam
Revista	Optica Acta
Ano	1983
Volume	30
Número	10
Páginas	1359-1362
Palavras-Chave	cyclotron absorption, laser-beam
Resumo	Charged particle acceleration in a laser beam with a superimposed cyclotron motion is considered. The energy aborption process is analysed using an exact quantum mechanical description of the particle motion. The results permit a simple quantum mechanical interpretation of energy absorption under a cyclotron resonance regime.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:8 , Times Cited:0
Área	FISMAT
Afiliação	Universidade Estadual de Campinas, Instituto de Física Centro Técnico Aerospacial, Instituto de Estudos Avancados

art. 85

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	Hydrogen molecule ion in superintense laser fields
Revista	The Journal of Chemical Physics
Mês	May
Ano	1983
Volume	78
Número	10
Páginas	6102-6105
Palavras-Chave	Laser fields, Structure
Resumo	The structure of H+2 under an intense laser field is discussed. It is shown that the dissociation energy decreases on increasing the laser field strength and a discussion on the validity criteria of the theory is also given.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited reference: 13, Times: 3
Área	FISMAT
Afiliação	Instituto de Física, Universidade Estadual de Campinas Divisão de Estudos Avançados, Centro Técnico Aeroespacial

art. 86

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Energy-gap distortion in solids under intense laser fields
Revista	Solid State Communications
Mês	Mar.
Ano	1983
Volume	45
Número	9
Páginas	783-785
Palavras-Chave	laser fields
Resumo	We discuss, within the framework of the nearly-free electron model, the influence of an intense laser field on the motion of an electron in the effective lattice potential. It is shown that, for moderately intense fields, the band gap decreases linearly with increasing laser intensity.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 11, Times Cited: 11
Área	FISMAT

art. 87

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	Photodisplacement spectroscopy of solids - theory
Revista	Applied Optics
Ano	1983
Volume	22
Número	18
Páginas	2882-2886
Palavras-Chave	photodisplacement signal
Resumo	A quantitative derivation is preseted for the production of the photodisplacement signal of a signal of a sample that is periodical heated by the absorption of modulated light. Numerical estimates are preseted for the surface dispacement of typical splids; they show us that one may get signal well above the thermal noise
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 17, Times Cited: 21
Área	FISMAT
Afiliação	Instituto de Atividades Espaciais, Centro Técnico Aeroespacial

art. 88

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M.
Título	On the use of thermal lens effect as a thermooptical spectroscopy pf solids
Revista	Applied Physics A: Material Science & Processing
Mês	May
Ano	1983
Volume	32
Número	2
Páginas	87-93
Palavras-Chave	Thermooptical effects
Resumo	A theoretical model for the thermal lens effect due to the absorption of modulated light by a solid is presented. The discussion includes an analysis of the modulation frequency response of the temperature rise in the solid. It is suggested that this effect may be used as a new technique for studying the thermo-optic properties of solids
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 19, Times Cited: 4
Área	FISMAT
Afiliação	Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 89

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M. Galvão, R. M. O. Lima, C. A. S.
Título	Effect of a radiation field on electrons bound on liquid helium
Revista	Physical Review B
Mês	Nov.
Ano	1983
Volume	28
Número	9
Páginas	5313-5315
Palavras-Chave	Radiation field, Liquid-helium surface
Resumo	Using the image-potential model, we discuss the influence of a radiation field on the distortion of the bound states of an electron trapped on a liquid-helium surface. It is shown that, for moderate field strengths, the ionization energy decreases with increasing field strength.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 19, Times Cited: 3
Área	FISMAT
Afiliação	Centro Técnico Aeroespacial, Instituto de Estudos Avançados Instituto de Física, Universidade Estadual de Campinas

art. 90

Tipo da Referência	Journal Article
Autor	Cesar, C. L. Vargas, H. Lima, C. A. S. Mendes Filho, J. Miranda, L. C. M.
Título	On the use of photoacoustic-spectroscopy for investigating adulterated or altered powdered coffee sample
Revista	Journal of Agricultural and Food Chemistry
Mês	May
Ano	1984
Volume	32
Número	6
Páginas	1355-1358
Palavras-Chave	photoacoustic spectroscop
Resumo	Modern photoacoustic techniques have been employed to assess the concentration of commonly encountered adulterants in powdered coffee samples. The feasibility of the method is demonstrated for samples containing a mixture of roast ground parchment, corn, and barley with pure coffee powder. Extension to multicomponent mixes is discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference:6, Times Cited: 12
Área	FISMAT
Afiliação	Universidade Estadual de Campinas, Instituto de Física Centro Técnico da Aeroespacial, Instituto de estudos Avançados

art. 91

Tipo da Referência	Journal Article
Autor	Cesar, C. L. Vargas, H. Pelzl, J. Miranda, L. C. M.
Título	Phase-resolved photoacoustic microscopy: Application to ferromagnetic layered samples
Revista	Journal of Applied Physics
Mês	May
Ano	1984
Volume	55
Número	10
Páginas	3460-3464
Palavras-Chave	acoustic signal
Resumo	The possibility of using the phase shift of the acoustic signal of different constituents as a new tool for a depth profile analysis of layered samples is discussed. This new method is experimentally demonstrated by measuring the phase variations of the photoacoustic detected ferromagnetic resonance of a sample consisting of an iron film bonded to a nickel film.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 20, times Cited: 16
Área	FISMAT
Afiliação	Instituto de Física, Universidade Estadual de Campinas Instituto de Estudos Avançados, Cntro Técnico Aeroespacial

art. 92

Tipo da Referência	Journal Article
Autor	Galvão, R M O Miranda, L. C. M.
Título	Laser-enhanced mobility in semiconducting layered structures
Revista	Journal of Physics C: Solid State Physics
Mês	Jan.
Ano	1984
Volume	17
Número	2
Páginas	L41-L45
Palavras-Chave	Laser fields, Semiconductors, Phonons
Resumo	The influence of a laser field on the scattering rate for the electron-phonon interaction in semiconductor layered heterojunction structures is discussed. It is found that for a laser beam polarised in the layer plane and with a frequency omega such that omega tau >1, where tau is the carrier relaxation time, the phonon-limited mobility increases with increasing laser field strength.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 15 , Times Cited:1
Área	FISMAT
Afiliação	Instituto de Estudo Avancados, Centro Tecnico Aerospacial

art. 93

Tipo da Referência	Journal Article
Autor	Galvão, R. M. O. Miranda, L. C. M. Mendonca, J. T.
Título	Stochastic dissociation of a laser-driven Morse oscillator
Revista	Journal of Physics B: Atomic Molecular and Optical Physics
Mês	Sep.
Ano	1984
Volume	17
Número	17
Páginas	L577-L582
Palavras-Chave	Laser fields, Stochastic dissociation
Resumo	A classical analysis is presented of the vibrational excitation of a molecule in a laser field, assuming a one-dimensional charged Morse oscillator as a model for the description of the molecular vibrations. Analytic estimates for the classical threshold for stochastic excitation and dissociation are determined as a function of the laser field amplitude and frequency. It is found that the rate of dissociation scales with the laser intensity, in agreement with the results of Shuryak.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 10 , Times Cited:12
Área	FISMAT
Grupo	LAS
Afiliação	Instituto. de Estudos Avancados, Centro Tecnico Aeroespacial Centro de Eletrodinamica, Instituto Superior Técnico, Lisboa

art. 94

Tipo da Referência	Journal Article
Autor	Gerck, E. Miranda, L. C. M.
Título	Quantum well lasers tunable by long wavelength radiation
Revista	Applied Physics Letters
Mês	May
Ano	1984
Volume	44
Número	9
Páginas	837-839
Palavras-Chave	Quantum wells, Structure
Resumo	It is suggested that the lasing frequency of GaAs-GaAlAs quantum well lasers can be tuned when the quantum well structure is irradiated with a pulsed low-energy long-wavelength laser. This new tuning mechanism is based on the decrease of the electron binding energy, in the well, with increasing intensity of the external laser field. Typically, 0.60 mJ of 10.6-µm radiation in a 1-ns pulse may blue-shift the quantum well laser frequency by approximately 20 nm
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Instituto de Estudos Avançados, Centro Técnico Aeroespacial
Tertiary Type	<E>WEBSCI: Cited Reference: 10, Times Cited: 3
Área	FISMAT
Afiliação	Centro Técnico Aerospacial, Instituto de Estudos Avaçados

art. 95

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	Nonresonant vibrational-excitation of diatomic-molecules-laser-driven morse oscillator model
Revista	Journal of Physical Chemistry
Ano	1984
Volume	88
Número	14
Páginas	3079-3082
Palavras-Chave	nonresonance vibrational excitation
Resumo	A discussion is presented for the nonresonance vibrational excitation of a heteronuclear diatomic molecule acted upon by a laser field. The diatomic molecule is assumed to be represented by a charged Morse oscillator. It is shown that for laser frequencies greater than the Morse oscillator vibrational frequency the molecular parameters become parametrically dependent frequency decrease. A numerical estimate for the laser intensities needed for the observation of the effects discussed in the present paper is also given.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:20 , Times Cited:2
Área	FISMAT
Afiliação	Centro Técnico Aerospacial, Instituto de Estudos Avancados Universidade Estadual de Campinas, Instituto de Física

art. 96

Tipo da Referência	Journal Article
Autor	Netzelmann, U. Pelzl, J. Vargas, H. Cesar, C. L. Miranda, L. C. M.
Título	Photoacoustic detection of FMR depth profiles
Revista	IEEE Transactions on Magnetics
Ano	1984
Volume	20
Número	5
Páginas	1252-1254
Palavras-Chave	Ferromagnetic resonance, Photoacoustic detection
Resumo	Depth profiles of ferromagnetic layered samples were studied with photoacoustically detected ferromagnetic resonance. Results obtained from recorder tapes and from a prepared nickel-iron sandwich are reported. Two different procedures based on frequency and phase resolved measurements were used to deconvolute the layered structure of the ferromagnetic samples. The depth resolution which is a function of the thermal diffusivity of the material and of the modulation frequency was as low as lum in the case of the ferromagnetic tapes.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited reference: 12, Times Cited: 4
Área	FISMAT
Afiliação	Ruhr Univ. Bochum, Inst. Expltl. Phys. Ger. Univesidade Estadual de Campinas, Instituto de Física Centro Técnico da Aeronautica, Instituto de Estudos Avançados

art. 97

Tipo da Referência	Journal Article
Autor	Cesar, C L Vargas, H Mendes Filho, J. Miranda, L. C. M.
Título	Comment on photoacoustic determination of thermal diffusivity of solids: aplication to CdS : response
Revista	Applied Physics Letters
Ano	1985
Volume	47
Número	4
Páginas	434-435
Palavras-Chave	Thermal diffusivity
Resumo	A recent article proposed a photoacoustic method for determining the thermal diffusivity of optically transparent solids, and gave experimental confirmation. However, the theoretical basis for the method was partially in error, was unnecessarily limited to a one- dimensional treatment of heat flow, and failed to incorporate the effect of finite beam size. As the method does appear to have the advantage of simplicity of experimental arrangement, a proper theoretical discussion is warranted.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:19 , Times Cited:14
Área	FISMAT
Afiliação	Universidade Estadual de Campinas Instituto de Física, Centro Tecnologico Aerospacial, Instituto de Estudos Avaçados

art. 98

Tipo da Referência	Journal Article
Autor	Cesar, C. L. Vargas, H. Miranda, L. C. M.
Título	Photoacoustic microscopy of layered samples: phase-detection technique
Revista	Journal of Physics D: Applied Physics
Mês	Apr.
Ano	1985
Volume	18
Número	4
Páginas	599-608
Palavras-Chave	Photoacoustic signal
Resumo	The possibility of using the phase shift of the photoacoustic signal of different constituents as an alternative tool for depth profile analysis of layered samples is discussed. The method proposed is experimentally demonstrated by measuring the phase variations of the photoacoustic-detected magnetic resonance of a sample consisting of a computer tape bonded to an aluminium foil. The experimental data are found to be in very good agreement with the theoretical predictions based upon the simple one-dimensional thermal piston model.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:19 , Times Cited:14
Área	FISMAT
Afiliação	Universidade Estadual de Campinas, Instituto de Física Centro Tecnologico Aerospacial, Instituto de Estudos Avaçados

art. 99

Tipo da Referência	Journal Article
Autor	Faria Jr., I. F Ghizoni, C. C. Miranda, L. C. M.
Título	Photopyroelectric scanning microscopy
Revista	Applied Physics Letters
Mês	May
Ano	1985
Volume	47
Número	11
Páginas	1154-1156
Palavras-Chave	Pyroelectric technique, Surface, Subsurface
Resumo	A new pyroelectric technique for the thermal wave scanning microscopy is presented. The potentiality of the method for probing and characterizing defects in solid samples is tested for surface and subsurface defects.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference, Times Cited: 13
Área	FISMAT
Afiliação	Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 100

Tipo da Referência	Journal Article
Autor	Ghizoni, C. C. Miranda, L. C. M.
Título	Photopyroelectric measurement of the thermal diffusivity of solids
Revista	Physical Review B
Mês	Dec.
Ano	1985
Volume	32
Número	12
Páginas	8392-8394
Palavras-Chave	thermal diffusivity
Resumo	A novel and simple approach using a lateral heating source for the sample is proposed as an alternative method for the photopyroelectric measurement of the thermal diffusivity of solids. The method is experimentally tested with use of a Si sample.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 22, Times Cited: 15
Área	FISMAT
Afiliação	Centro Técnico Aeroespacial, Instituto de Estudos Avançados

art. 101

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	Vibrational-excitation due to atom molecule collision in an intense laser field
Revista	Journal of Physical Chemistry
Ano	1985
Volume	89
Número	7
Páginas	1245-1249
Palavras-Chave	Nonresonance vibrational, Diatomic molecules, Atom, Molecule
Resumo	A theory for the nonresonance vibrational excitation of diatomic molecules under impact excitation conditions in na intense laser field is developed. Specific consideration is given to 0 ->n transitions in He-Lih collisions. It is found for this system that at relatively large collision times direct many-photon processes are dominant . However, with decreasing collisions time the compensation for resonance mismatch requires fewer photons to assist the vibrational excitation. The behavior of the different excitation processes for the 0 -> n transitions on the laser field strength is also.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:22 , Times Cited:2
Área	FISMAT
Afiliação	Centro Técnico Aerospacial, Instituto de Estudos Avancados Universidade Estadual de Campinas, Instituto de Física

art. 102

Tipo da Referência	Journal Article
Autor	Mandelis, A. Care, F. Chan, K. K. Miranda, L. C. M.
Título	Photopyrolectric detection of phase-transitions in solids
Revista	Applied Physics A: Material Science & Processing
Mês	May
Ano	1985
Volume	38
Número	2
Páginas	117-122
Palavras-Chave	photopyroeletric spectroscopy
Resumo	The recently developed photopyroeletric spectroscopy (P2 ES) has been used to investigation phase transitions in solids. In our variable temperature experiments, specific heat curves for Rochele Salt and V2 O4 powders were obtained and found in good agreement with results obtained previously via more experimentally involved methods .
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 22, Times Cited: 30
Área	FISMAT
Afiliação	Univ. Toronto, Dpt. Mech. Engn., Photoacoustic Lab. Univ. Western Ontario, CTR Chem. Phys.

art. 103

Tipo da Referência	Journal Article
Autor	Mayer, I. L. Miranda, L. C. M. Galvão, R. M. O.
Título	Electron transmission through a potential barrier in the presence of an electromagnetic-field-unitary transformation method
Revista	Canadian Jouirnal of Physics
Ano	1985
Volume	63
Número	8
Páginas	1083-1087
Palavras-Chave	electromagnetic fields
Resumo	Using the unitary transformation method , we discuss the influence of an intense high-frequency electromagnetic field on the transmission probability of an electron through a one -dimensional square barrier. It is shown that transmission probability increases exponentially with increasing field strength .
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 20 , Times Cited:1
Área	FISMAT
Afiliação	Unive. Western Ontario Centro Técnico Aerospacial, Instituto de Estudos Avançados

art. 104

Tipo da Referência	Journal Article
Autor	Mayer, I. L. Miranda, L. C. M. Tong, B. Y. Galvão, R. M. O.
Título	On the stochastic ionisation of electrons in quantum well structures
Revista	Journal of Physics B: Atomic Molecular and Optical Physics
Mês	Oct.
Ano	1985
Volume	18
Número	19
Páginas	3835-3847
Palavras-Chave	Stochastic ionisation, Quantum well, Structures
Resumo	A classical analysis is presented of the stochastic ionisation of an electron bound in the potential well of semiconducting quantum well structures (as formed, for example, in layered structures of semiconductor films), driven by an oscillating uniform electric field. Analytical and numerical estimates for the classical threshold for stochastic ionisation are determined as a function of the oscillating field frequency and amplitude. It is shown that in the high-frequency region the classical ionisation rate scales with the field intensity IL as ILv, typical of multiphoton processes. The classically obtained exponent v is in good agreement with the quantum-mechanical prediction. The suggestion of a readily accessible system for an experimental test of the theory, namely, semiconducting quantum well structures, (GaAs-AlxGa1-xAs), is presented, and the conditions for experimental observations are discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 26 , Times Cited:6
Área	FISMAT
Afiliação	Department of Physics and Centre for Chemical Physics, The University of Western Ontario Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 105

Tipo da Referência	Journal Article
Autor	Faria Jr., I. F. Ghizoni, C. C. Miranda, L. C. M. Vargas, H.
Título	Photopyroelectric versus photoacoustic characterization of photovoltaic cells
Revista	Journal of Applied Physics
Mês	May
Ano	1986
Volume	59
Número	9
Páginas	3294-3296
Palavras-Chave	Photothermal pyroelectric technique, Photovoltaic cells, Photoacoustic detection
Resumo	The photothermal pyroelectric technique is applied to the characterization of photovoltaic cells and a comparison with the photoacoustic detection is presented. The difference between the photoacoustic and the pyroelectric data is interpreted in terms of a simple model for a junction-type solar cell.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI:Cited Reference: 18, Times Cited: 14
Afiliação	Instituto de Estudos Avançados, Centro Técnico Aeroespacial Instituto de Física, Universidade Estadual de Campinas

art. 106

Tipo da Referência	Journal Article
Autor	Galvão, R. M. O Miranda, L. C. M.
Título	A note on the effects of screening on the electronic states of an atom embedded in a laser fusion plasma
Revista	Journal of Physics B: Atomic Molecular and Optical Physics
Mês	Feb.
Ano	1986
Volume	19
Número	3
Páginas	L71-L74
Palavras-Chave	Impurities, Ion, High-temperature, Atom
Resumo	The changes induced in the electronic structure of an impurity ion embedded in a high-temperature dense electron plasma, simultaneously driven by an intense laser field, are discussed. It is shown that, at the laser-plasma resonance, the ground-stage energy becomes a decreasing function of the laser intensity.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 2
Área	FISMAT
Afiliação	Instituto de Estudos Avancados, Centro Tecnico Aerospaciais

art. 107

Tipo da Referência	Journal Article
Autor	John, P. K. Miranda, L. C. M. Rastogi, A. C.
Título	Thermal diffusivity measurement using the photopyroelectric effect
Revista	Physical Review B
Mês	Sep.
Ano	1986
Volume	34
Número	6
Páginas	4342-4345
Palavras-Chave	thermal diffusivity
Resumo	A novel and simple method using the photopyroelectric effect is described for the measurement of the thermal diffusivity of solids. The method is used in the case of metals, semiconductors, and insulators, covering several orders of magnitude in thermal diffusivity. It has advantages over conventional thermal wave spectroscopic methods.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 24, Times Cited: 36
Área	FISMAT
Afiliação	Centre for Chemical Physics, University of Western Ontario

art. 108

Tipo da Referência	Journal Article
Autor	Pessoa Jr., O. Cesar, C. L. Patel, N. A. Vargas, H Ghizoni, C. C. Miranda, L. C. M.
Título	Two-beam photoacoustic phase measurement of the thermal diffusivity of solids
Revista	Journal of Applied Physics
Mês	Feb.
Ano	1986
Volume	59
Número	4
Páginas	1316-1318
Palavras-Chave	Thermal diffusivity
Resumo	A simple method is demonstrated for obtaining the thermal diffusivity of solids, by measuring the phase lag between a front and rear illumination, at a single chopping frequency. The method is tested using some semiconductor and glass samples.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 12, Times Cited: 98
Área	FISMAT
Afiliação	Instituto de Física, Universidade Estadual de Campinas Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 109

Tipo da Referência	Journal Article
Autor	Rodrigues, N. A. S. Ghizoni, C. C. Miranda, L. C. M.
Título	Experimental evidence of thermoelectric amplification of acoustic waves in nickel
Revista	Journal of Applied Physics
Mês	Aug.
Ano	1986
Volume	60
Número	4
Páginas	1528-1530
Palavras-Chave	temperature gradient, acoustic waves
Resumo	We present experimental results on the detection of an exponentially growing acoustic signal in nickel as a function of the temperature gradient applied to the sample. These results are interpreted as resulting from the onset of the thermoelectric amplification of acoustic waves in the sample.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 7, Times Cited: 4
Área	FISMAT
Afiliação	Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 110

Tipo da Referência	Journal Article
Autor	Rodrigues, N. A. S. Ghizoni, C. C. Miranda, L. C. M.
Título	Acoustic wave instability in Ni irradiated by CO2 laser pulses: Thermoelectric amplification
Revista	Solid State Communications
Mês	Oct.
Ano	1986
Volume	60
Número	4
Páginas	323-326
Palavras-Chave	Temperature gradient, Thermoelectric amplification, Acoustic wave
Resumo	The exponential growth of acoustic waves in Ni as a function of the temperature gradient applied to the sample is reported. The temperature gradient is established using intense short CO2 laser pulses. The results are interpreted as resulting from the onset of the thermoelectric amplification of acoustic waves in the sample.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 13, Times Cited: 2
Área	FISMAT
Afiliação	Instituto de Estudos Avançados Centro Técnico Aeroespacial

art. 111

Tipo da Referência	Journal Article
Autor	Bento, A. C. Vargas, H. Aguiar, M. M. F. Miranda, L. C. M.
Título	Photoacoustic characterization of quartz-thermal-diffusivity
Revista	Physics and Chemistry of Glasses
Mês	June
Ano	1987
Volume	28
Número	3
Páginas	127-129
Palavras-Chave	quartz, photoacoustic thermal
Resumo	The photoacoustic thermal characterization of some quartz and glass sample is discussed. The physical quantity used as a thermal monitoring parameter is the thermal diffusivity, which is measured using the photoacoustic phase data. At low modulation frequencies the thermal diffusivity is obtained from the phase lag between the front and rear illumination. At high modulation frequencies the thermal diffusivity is obtained from the frequency dependence of the front phase illumination data.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:9, Times Cited:29
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas, Instituto de Física Universidade Federal da Bahia, Instituto de Física Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 112

Tipo da Referência	Journal Article
Autor	Faria Jr., I. F. Miranda, L. C. M. Vargas, H. Fernandes, E.
Título	Optical inspection and monitoring of crazing in enamelled wires using light scattering
Revista	Journal of Physics E: Scintific Instruments
Mês	July
Ano	1987
Volume	20
Número	7
Páginas	891-893
Palavras-Chave	He-Ne laser
Resumo	A new method using He-Ne laser is proposed for the inspection and monitoring of micro-defects in enamelled wires. The method is based on the measurement of the light scattered from the wire. Its advantages over conventional optical and scanning electron microscopy are also discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 5, Times Cited:1
Área	FISMAT
Afiliação	Centro Tecnico Aeroespacial, Instituto de Estudos, Avancados

art. 113

Tipo da Referência	Journal Article
Autor	Hirata, D. Galvão, R. M. O. Miranda, L. C. M.
Título	Effect of a laser field on the electron-ion scattering in a dense plasma
Revista	Revista Unimar
Ano	1987
Volume	9
Número	1
Páginas	85-92
Palavras-Chave	Laser fields, Scattering, Ion
Resumo	The effect of a laser field on the inelastic scattering of electrons by one-electron ions in a dense plasma is investigated. The total cross-sections for 1s-2s and 1s-2p transitions are calculated. The laser field modifies the cross-sections by lowering the energy threshold, introducing an anisotropy with respect to the laser polarization, and giving rise to a non-monotonic dependence on the electron energy which is characteristic of multiphoton process.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E:
Área	FISMAT
Afiliação	Instituto de Física, Universidade de São Paulo Instituto de Estudos Avançados, Centro Técnico Aerospacial

art. 114

Tipo da Referência	Journal Article
Autor	Leite, N. F. Cella, N. Vargas, H. Miranda, L. C. M.
Título	Photoacoustic measurement of thermal diffusivity of polymer foils
Revista	Journal of Applied Physics
Mês	Apr.
Ano	1987
Volume	61
Número	8
Páginas	3025-3027
Palavras-Chave	Thermal diffusivity, Photoacoustic signal
Resumo	The photoacoustic measurement of polymer foils, typically 170–200 µm thick, is discussed. It is shown that the measurement based upon the phase lag between the front and rear illuminations is applicable only in a limited range of frequencies from 6 to 12 Hz. The dominant mechanism responsible for the photoacoustic signal, in almost the entire frequency range 10–100 Hz, is proven to be the thermoelastic bending of the foil samples. The thermal diffusivity is then obtained from the frequency dependence of the front-phase illumination data.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Universidade Estadual de Campinas (UNICAMP), Instituto de Física, Ministério da Ciência e Tecnologia, Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais
Tertiary Type	<E>WEBSCICited Reference: 11, Times Cited: 41
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas,Instituto de Física Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 115

Tipo da Referência	Journal Article
Autor	Lima, G. A. R. Baesso, M. L. Arguello, Z. P. Silva, E. C. da Vargas, H. Miranda, L. C. M.
Título	Phase-resolved photoacoustic spectroscopy: application to metallic-ion-doped glasses
Revista	Physical Review B
Mês	Dec.
Ano	1987
Volume	36
Número	18
Páginas	9812-9815
Palavras-Chave	Photoacoustic signal, Soda lime silica glass, Glasses
Resumo	The possibility of using the phase shift of the photoacoustic signal of different constituents of a composite sample for resolving the spectra of the constituents, at a fixed modulation frequency, is discussed. The proposed method is experimentally tested using samples of soda-lime–silica glass doped with binary oxide mixtures.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited: 22
Área	FISMAT
Grupo	LAS
Afiliação	Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 116

Tipo da Referência	Journal Article
Autor	Mello, S. M. N. Ghizoni, C. C. Miranda, L. C. M. Vargas, H.
Título	Photoacoustic characterization of photovoltaic cells
Revista	Journal of Applied Physics
Mês	June
Ano	1987
Volume	61
Número	11
Páginas	5176-5178
Palavras-Chave	photoacoustic
Resumo	The photoacoustic characterization of Si solar-cell samples having distinct internal resistances, both at low and high modulation frequencies, yielded results significantly different from each other. For large samples with very small internal resistances (~0.1 ), the additional contribution of the current iss ipation near short-circuit conditions yielded results similar to those obtained with photothermal radiometry or the pyroelectric detection. For small samples, the results for the conversion efficiency, both at low and high modulation frequencies, are similar to ones obtained from the conventional electrical measurements.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI:Cited Reference: 12, Times Cited: 5
Área	FISMAT
Afiliação	Instituto de Estudos Avançados, Centro Técnico Aeroespacial

art. 117

Tipo da Referência	Journal Article
Autor	Nery, J. W. Vargas, H. Pessoa, H. Reis, F. D. M. Gabrielli, A. C. Miranda, L. C. M. Vinha, C. A.
Título	Photoacoustic-spectroscopy for depth-profile analysis and herbicice monitoring in leaves
Revista	Analyst
Mês	Nov.
Ano	1987
Volume	112
Número	11
Páginas	1487-1490
Palavras-Chave	Photoacoustic spectroscopy
Resumo	Depth profiles of double-layer biological samples obtained by photoacoustic spectroscopy were studied using the two-signal phase-resolved method. The application of the method was demonstrated by singling out the spectra of the cuticle and the pigment layers of a leaf, and the pericarps and the endosperm layers of a corn kernel. The use of the method for monitoring temporal changes occurring in a leaf under the action of a herbicide was also investigated.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:12 , Times Cited:25
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas, Instituto de Física Universidade Estadual de Campinas, Instituto Química Universidade Estadual de Campinas, Instituto Biologia Instituto Nacional Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais Departamento de Física, Universidade do Mato Grosso do Sul

art. 118

Tipo da Referência	Journal Article
Autor	Perondi, L. F. Miranda, L. C. M.
Título	Minimal-volume photoacoustic cell measurement of thermal diffusivity: Effect of the thermoelastic sample bending
Revista	Journal of Applied Physics
Mês	Oct.
Ano	1987
Volume	62
Número	7
Páginas	2955-2959
Palavras-Chave	Thermal diffusivity
Resumo	A minimal-volume photoacoustic cell method is demonstrated for obtaining the thermal diffusivity of solids. It is based on the measurement of the acoustic signal as a function of the modulation frequency in the region where the sample is thermally thick. The method is tested by using metal, semiconductor, and polymer samples.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 19, Times Cited: 82
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 119

Tipo da Referência	Journal Article
Autor	Riette, H. L. Miranda, L. C. M. Vargas, H.
Título	Characterization of photovoltaic cells using the photothermal deflection spectroscopy
Revista	Applied Physics A: Material Science & Processing
Mês	May
Ano	1987
Volume	44
Número	3
Páginas	219-222
Palavras-Chave	photothermal deflection spectroscopy
Resumo	The use of photothermal deflection spectroscopy for a noncontact characterization of photovoltaic cells is presented. It is shown that this technique is capable of providing not only the optimum load resistance and conversion efficiency, but also the value of the internal series resistance of the cell. A comparison with other photothermal detection techniques is also presented .
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 15, Times Cited: 2
Área	FISMAT
Afiliação	Centro Técnico Aerospacial, Instituto de Estudos Avancados Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais Universidade Estadual de Campinas, Instituto de Física

art. 120

Tipo da Referência	Journal Article
Autor	Silva, M. D. da Bandeira, I. N. Miranda, L. C. M.
Título	Open-cell photoacoustic radiation detector
Revista	Journal of Physics E: Scientific Instruments
Mês	Dec.
Ano	1987
Volume	20
Número	12
Páginas	1476-1478
Palavras-Chave	photoacoustic radiation
Resumo	A simple and inexpensive photoacoustic radiation detector requiring no cell machining and minimal preparation is proposed. It consists of the front air chamber of a commercial electret microphone used as the transducer medium itself. The measured noise-equivalent power (NEP) at a modulation frequency of 40 Hz was found to be of the order of 5x10-7 W Hz-1/2 for both black-body and visible illumination.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:9 , Times Cited:13
Área	FISMAT
Grupo	LAS
Afiliação	Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 121

Tipo da Referência	Journal Article
Autor	Torres Filho, A. Perondi, L. F. Miranda, L. C. M.
Título	Photoacoustic monitoring of adhesive curing
Revista	Journal of Applied Polymer Science
Ano	1988
Volume	35
Número	1
Páginas	103-114
Palavras-Chave	Crosslinking reaction, Thermal properties, Liquids
Resumo	The crosslinking reaction of an epoxy-based rein has been monitored by observing the time evolution of the thermal diffusivity of the mixture, using photoacoustic spectroscopy. The results are interpreted in terms of the expected thermal properties of liquids, polymers and solids, and a comparison with the reported viscosity behavior in similar systems is also made. The potential of the technique for following the curing process is discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 14, Times Cited:22
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 122

Tipo da Referência	Journal Article
Autor	Vargas, H. Miranda, L. C. M.
Título	Photoacoustic and related photothermal techniques
Revista	Physics Reports: Review Section of Physics Letters
Mês	Apr.
Ano	1988
Volume	161
Número	2
Páginas	43-101
Palavras-Chave	Photoacoustic techniques, Thermal properties
Resumo	We review the theory and applications of the photoacoustic and related methods belonging to the general area of photothermal measurement techniques. This essay is intended for researchers especially unfamiliar with the basic ideas and potentialities of this rapidly developing field. The applications of photothermal techniques include spectroscopic applications, such as infrared and microwave spectroscopies, monitoring of non-radiative deexcitation processes, biological applications, and measurements of thermal properties.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 286, Times Cited: 168
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Física, Universidade Estadual de Campinas Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais (INPE)

art. 123

Tipo da Referência	Journal Article
Autor	Arista, N. R. Galvão, R. O. M. Miranda, L. C. M.
Título	Laser-field effects on the interaction of charged particles with a degenerate electron gas
Revista	Physical Review A
Mês	Oct.
Ano	1989
Volume	40
Número	7
Páginas	3808-3816
Palavras-Chave	Laser fields, Random-phase-approximation
Resumo	We formulate a general description of the inelastic interaction between charged particles and a degenerate plasma in the presence of a strong laser field. The excitations in the plasma are described according to the random-phase-approximation formalism, in terms of the dielectric function of the medium, and including the effects of the laser field on the dynamical response. The energy exchange and the scattering rate of the particle in the plasma are modified by multiphoton processes. The formalism describes the excitation of plasmons and electron-hole pairs, with simultaneous emission or absorption of photons. We calculate the contribution of these processes to the energy-loss rate and to the mean free path of the particle in the range of solid-state densities. New effects due to the laser field are expected for intensities similar to those used in laser fusion experiments.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 21, Times Cited: 7
Área	FISMAT
Grupo	{LAP, LAS}
Afiliação	Centro Atómico Bariloche, División Colisiones Atómicas Laboratorio Associado de Plasmas, Instituto de Pesquisas Espaciais Laboratorio Associado de Materiais, Instituto de Pesquisas Espaciais

art. 124

Tipo da Referência	Journal Article
Autor	Baesso, M. L. Mansanares, A. M. Silva, E. C. da Vargas, H. Miranda, L. C. M.
Título	Phase-resolved photoacoustic spectroscopy and EPR investigation of MnO2- and CoO-doped soda-lime glasses
Revista	Physical Review B
Mês	July
Ano	1989
Volume	40
Número	3
Páginas	1880-1884
Palavras-Chave	Aluminate glasses, Soda lime glass
Resumo	A discussion on the use of the phase shifts of the photoacoustic signal of different constituents of a composite sample for resolving their individual spectra is presented. It is experimentally shown that as long as we are interested in a qualitative analysis the method is simple and fast. For a quantitative analysis in which the nonradiative relaxation time and the characteristic diffusion time within the optical-absorption depth are sought, the method presents some limitations. This is demonstrated using MnO2- and CoO-doped soda-lime–silica glass samples.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Instituto de Física, Universidade Estadual de Campinas, Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais
Tertiary Type	E WEBSCI: Cited Reference: 9, Times Cited: 16
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Física, Universidade Estadual de Campinas, Laboratório Associado de Sensores e Materiais nstituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 125

Tipo da Referência	Journal Article
Autor	Bento, A. C. Aguiar, M. M. F. Vargas, H. Silva, M. D. da Bandeira, I. N. Miranda, L. C. M.
Título	Open photoacoustic cell X-ray-detection
Revista	Applied Physics B: Photophysics and laser chemistry
Mês	Mar.
Ano	1989
Volume	48
Número	3
Páginas	269-272
Repositório	<sid.inpe.br/marciana/2003/05.08.10.36>
Resumo	A simple open-cell configuration photoacoustic x ray detector is experimentally demonstrated. The front air chamber of a commercial electret microphone is used as the transducer medium of conventional photoacoustics. The observed signal is well described by the thermal diffusion model for the photoacoustic signal.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 20, Times Cited: 9
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas, Instituto de Física Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 126

Tipo da Referência	Journal Article
Autor	Bento, A. C. Mansanares, A. M. Vargas, H. Miranda, L. C. M.
Título	Photoacoustic measurement of the thermal-diffusivity of anisotropic samples using the phase lag method
Revista	Physics and Chemistry of Glasses
Mês	Aug.
Ano	1989
Volume	30
Número	4
Páginas	160-162
Palavras-Chave	Thermal diffusivity, Crystals of quartz, Amethyst.
Resumo	The extension of the photoacoustic phase lag method for measuring the thermal diffusivity to the case of anisotropic sample is tested using single crystals of quartz and amethyst.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:10 , Times Cited:3
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas, Instituto de Física Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 127

Tipo da Referência	Journal Article
Autor	Cella, N. Vargas, H. Galembeck, E. Galembeck, F. Miranda, L. C. M.
Título	Photoacoustic monitoring of crosslinking reactions in low-density polyethlene
Revista	Journal of Applied Polymer Science C: Polymer Letters
Mês	Aug.
Ano	1989
Volume	27
Número	9
Páginas	313-320
Palavras-Chave	Photoacoustic techniques, Photothermal techniques
Resumo	In the last 10 years we have witnessed the rapid development of photoacoustic and related photothermal techniques for nondestructive materials inspection in several areas of research. For a comprehensive review of photothermal wave phenomena and their applications, we refer to the books by Rosenewaig and Mandelis and to some of the many review articles published on the subject. The photoacoustic (PA) spectroscopy looks directly at the heat generated in a sample, owing to the nonradiative deexcitation processes following the absorption of modulated light. In a conventional PA experimental arrangement a sample is enclosed in an air-tight cell and exposed to a chopped light beam. As a result of the periodic heating of the sample, owing to the light-into-heat conversion, the pressure in the chamber oscillates at the chopping frequency and can be detected by a sensitive microphone coupled to the cell. The resulting PA signal depends not only on the amount of -heat generated in the sample, i.e., on the optical absorption coefficient for the incident radiation as well as the light-into-heat conversion efficiency, but also on how this heat diffuses through the sample. The dependence upon these factors is the main reason underlying the versatility of the PA technique. Since the PA signal depends on the absorption coefficient of the incident radiation, spectroscopic studies can be performed, whereas the fact that the signal is also proportional to the light-into-heat conversion efficiency means that it is complementary to other photoinduced energy conversion processes and can, therefore, be used to study nonthermal deexcitation processes. Finally, the fact that the PA signal depends on how the heat diffuses through the sample allows us to perform not only thermal characterization of the sample (i.e., measurement of its theremal properties) but also to conduct thermal imaging. This last point comes from the fact that the thermal wave generated by the absorption of the incident light pulse may be reflected and scattered as it encounters cracks, defects, and so on, thereby affecting the detected signal.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 24, Times Cited:9
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas, Instituto de Física Universidade Estadual de Campinas, Instituto de Química Instituto de Pesquisas Espaciais, Labopratório Associado de Sensores e Materiais

art. 128

Tipo da Referência	Journal Article
Autor	Ferreira, S. O. Chen, Y. A. Bandeira, I. N. Miranda, L. C. M. Vargas, H.
Título	Photoacoustic measurement of the thermal diffusivity of Pb1-xSnxTe alloys
Revista	Physical Review B
Mês	Apr.
Ano	1989
Volume	39
Número	11
Páginas	7967-7970
Palavras-Chave	thermal diffusivity, Photoacoustic measurement
Resumo	A simple open photoacoustic cell method is demonstrated for obtaining the thermal diffusivity of Pb1-xSnxTe alloys. It is based upon the measurement of the acoustic signal as a function of the modulation frequency in the region where the sample is thermally thick. The dependence of the measured values of the thermal diffusivity as a function of the alloy composition is also discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 14 Times: 15
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Física, Universidade Estadual de Campinas Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 129

Tipo da Referência	Journal Article
Autor	Hirata, D. Galvão, R. M. O. Miranda, L. C. M.
Título	Effect of a laser field on the electron-ion scattering in a dense plasma
Revista	Revista Brasileira de Física
Ano	1989
Volume	19
Número	4
Páginas	612-620
Palavras-Chave	Laser fields, Scattering, Ion
Resumo	The effect of a laser field on the inelastic scattering of electrons by one-electron ions in a dense plasma is investigated. The total cross-sections for 1s-2s and 1s-2p transitions are calculated. The laser field modifies the cross-sections by lowering the energy threshold, introducing an anisotropy with respect to the laser polarization, and giving rise to a non-monotonic dependence on the electron energy which is characteristic of multiphoton process.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Física, Universidade de São Paulo Instituto de Estudos Avançados, Centro Técnico da Aerospacial Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 130

Tipo da Referência	Journal Article
Autor	Iacovacci, M. Silva, E. C. da Vargas, H. Galembeck, F. Pinheiro, E. A. Miranda, L. C. M.
Título	Photoacoustic monitoring of magnetite-crystal formation from iron(III) hydroxide acetate: Comparison with ESR results
Revista	Journal of Applied Physics53
Mês	June
Ano	1989
Volume	65
Número	12
Páginas	5150-5153
Palavras-Chave	Crystals, Temperature
Resumo	The formation of crystalline magnetite by 1-h heat treatment of iron(III) hydroxide acetate is described. This amorphous-crystalline solid transformation is monitored by electron-spin resonance and photoacoustic spectroscopies. No significant changes were detected for samples heated below 190 °C. Above this temperature both techniques presented results following a definite pattern, namely, the enhancement of ion mobility leading to particle growth and crystallization for a temperature up to 240 °C and the onset of magnetic ordering of magnetite near this temperature.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 21, time Cited: 3
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Física, Universidade Estadual de Campinas Instituto de Química, Universidade Estadual de Campinas Instituto de Pesquisas Espaciais. Laboratório Associado de Sensores e Materiais
Projeto	LAS

art. 131

Tipo da Referência	Journal Article
Autor	Leite, N. F. Russo, L. C. Miranda, L. C. M. Ribeiro, M. F. Miranda, P. B. Oliva, R. V. Nogueira, R. A. Ueki, R. K. Luz, R. O.
Título	Campact photothermal spectrometer using liquid crystal choppers
Revista	Revista Física Aplicada e Instrumentação
Ano	1989
Volume	4
Número	1
Páginas	74-83
Palavras-Chave	Liquid crystals
Resumo	A simple, compact and inexpensive light beam modulator using liquid crystal displays is suggested for the -development of compact spectrometers. Its uses in photothermal sensing devices (e.g., optical pyrometers ) is also indicated, and the development of specifically designed liquid crystal displays for a application as light beam choppers is suggested
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI
Área	FISMAT
Grupo	LAS
Afiliação	Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais, Instituto de Física, Universidade Estadual de Campinas
Projeto	LAS

art. 132

Tipo da Referência	Journal Article
Autor	Mansanares, A. M. Baesso, M. L. Silva, E. C. da Gandra, F. C. G. Vargas, H. Miranda, L. C. M.
Título	Photoacoustic and ESR studies of iron-doped soda-lime glasses: Thermal diffusivity
Revista	Physical Review B
Mês	Oct.
Ano	1989
Volume	40
Número	11
Páginas	7912-7915
Palavras-Chave	Photoacoustic technique, Thermal diffusivity, Iron-doped, Soda lime glass, Glasses
Resumo	The photoacoustic technique is used to measure the thermal diffusivity of iron-doped soda-lime glasses. To explain the thermal diffusivity behavior as a function of the iron content in the samples, electron-spin-resonance data were used. It is concluded that the main reason for the observed changes in the thermal diffusivity is the ferric ion entering substitutionally at the Si4+ sites.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 20, Times Cited: 17
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Física, Universidade Estadual de Campinas Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 133

Tipo da Referência	Journal Article
Autor	Pinto Neto, A. Vargas, H. Miranda, L. C. M. Leite, N. F.
Título	Photoacoustic investigation of semiconductors: Influence of carrier diffusion and recombination in PbTe and Si
Revista	Physical Review B
Mês	Aug.
Ano	1989
Volume	40
Número	6
Páginas	3924-3930
Palavras-Chave	Semiconductors, Photoacoustic signal
Resumo	The photoacoustic signal of a narrow-gap semiconductor and of Si is investigated as a function of the modulation frequency through the use of a heat-transmission configuration. It is shown that in the thermally thick modulation-frequency range the signal amplitude can single out the different heating sources responsible for the photoacoustic signal. It is also shown that from the signal phase data, as a function of the modulation frequency, we can obtain the values of the surface recombination velocity and the nonradiative band-to-band recombination time.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Instituto de Fiiaasica, Universidade Estadual de Campinas, Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais
Tertiary Type	E WEBSCI: Cited Reference: 20, Times Cited: 25
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Fiiaasica, Universidade Estadual de Campinas Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 134

Tipo da Referência	Journal Article
Autor	Torres Filho, A. Leite, N. F. Miranda, L. C. M. Cella, N. Vargas, H.
Título	Photoacoustic investigation of iodine-doped polystyrene
Revista	Journal of Applied Physics
Mês	July
Ano	1989
Volume	66
Número	1
Páginas	97-102
Palavras-Chave	Polystyrene films, Photoacoustic spectroscopy
Resumo	The kinetics of iodine doping of atactic polystyrene films is investigated using photoacoustic spectroscopy. The changes in the photoacoustically measured physical properties, such as nonradiative relaxation time and thermal diffusivity, are present as a function of the doping time. The results show strong evidence that an order-disorder transition is taking place as a function of the doping time. The suggested order-disorder transition is also evident in the dielectric constant measurements of the doped films.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 24, Times Cited: 23
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais Instituto de Física, Universidade Estadual de Campinas
Projeto	LAS

art. 135

Tipo da Referência	Journal Article
Autor	Torres Filho, A. Leite, N. F. Miranda, L. C. M. Stempniak, R. A.
Título	Laser-induced iodine desorption from impregnated polystyrene
Revista	Journal of Applied Physics
Mês	July
Ano	1989
Volume	66
Número	1
Páginas	407-412
Palavras-Chave	Polystyrene film, Photoprocess induces
Resumo	The Ar + laser-stimulated desorption of iodine molecules from an impregnated polystyrene film was investigated. The photoprocess induces a color change (from red to the transparent) and leaves in the film a marked print, which is related to the laser beam characteristics. The experimental data was fitted using a set of differential equations relating the time dependence of the film temperature and absorption coefficient. At low-power levels (<25 mW), the time evolution of the laser transmitted power could be well matched to the experimental data. The wavelength dependence of the marking process was also studied and the relative contribution of photodissociative and photothermal processes was inferred.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais, Instituto de Física, Universidade Estadual de Campinas, Departamento de F ísica, Instituto Tecnológico de Aeronáutica
Tertiary Type	E WEBSCI: Cited Reference: 9, Times Cited: 2
Área	FISMAT
Grupo	LAS
Afiliação	Inatituto de Pesquisas Espaciais,Laboratório Associado de Sensores e Materiais Departamento de Física, Instituto Tecnológico de Aeronáutica, Centro Técnico Aeroespacial

art. 136

Tipo da Referência	Journal Article
Autor	Arista, N. R. Galvão, R. O. M. Miranda, L. C. M.
Título	Influence of a strong laser field on the stopping power for charged test particles in nondegenerated plasma
Revista	Journal of the Physical Society of Japan
Mês	Feb.
Ano	1990
Volume	59
Número	2
Páginas	544-552
Palavras-Chave	High-intensity electromagnetic, Laser fields, High field
Resumo	The influence of a high-intensity electromagnetic wave on the classical energy loss rate of ions in nondegenerate plasmas is calculated. Is is shown that the laser field decreases the plasma stopping power and makes it anisotropy with respect to the polarization of the wave electric field.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 28, Times Cited: 4
Área	FISMAT
Grupo	{LAP, LAS}
Afiliação	Centro Atómico de Bariloche, Comissión Nacional de Energia Atómica Instituto de Pesquisas Espaciais, Laboratório Associado Palsma Instituto de Pesquisas Espaciais, Laboratório Associado Sensores e Materiais

art. 137

Tipo da Referência	Journal Article
Autor	Fabbri, M. Bandeira, I. N. Miranda, L. C. M.
Título	A model for the solute transport in PbSnTe growth by vapor-melt-solid technique
Revista	Journal of Crystal Growth
Mês	July
Ano	1990
Volume	104
Número	2
Páginas	435-444
Palavras-Chave	Diffusion-controlled growth, Transport, Liquid crystals
Resumo	We investigate the basic mechanism occuring in diffusion-controlled growth of Pb1-xSnxTe single crystals by the vapor-melt-solid (VMS) technique. A physical model for the mass transfer by the vapor and liquid phases without parasitical convection is stated and solved with an implicit moving-boundary finite-difference scheme. It is shown that VMS allows for the attainment of good crystal axial homogeneity, through the reduction of the effective diffusion length in the vapor phase, allied to the supression of convective effects at the liquid-solid boundary. Results from numerical simulations suggest how VMS can be improved by an appropriate design of the furnace temperature profiles and translation rate. Also, the influence of non-equimolar evaporation-condensation processes at the liquid-vapor interfaces is considered; it indicates that VMS is not suited for substances whose components show large differences in volatility from the liquid phase.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:18 , Times Cited:1
Área	FISMAT
Grupo	LAS
Afiliação	Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 138

Tipo da Referência	Journal Article
Autor	Franzan, A. H. Leite, N. F. Vargas, H. Miranda, L. C. M
Título	Investigation of poling effects on PVDF pyroelectric detectors-photoacoustic thermal-diffusivity measurements
Revista	Applied Physics A: Material Science & Processing
Mês	Apr.
Ano	1990
Volume	50
Número	4
Páginas	431-438
Palavras-Chave	Thermal properties, Polyvinylidene fluoride
Resumo	The influence of poling fields on the electrical and thermal properties of polyvinylidene fluoride (PVDF) pyroelectric detectors is discussed. It is shown that both the dielectric constant and the thermal diffusivity exhibit a monotonically increasing behavior with the poling field. The detectors were fabricated by solution casting of the PVDF films followed by thermal poling. It is concluded that the predominant crystal phase present in our films is the y-form. Except for the dielectric breakdown field, all the electrical and thermal properties of these films were found to be in good agreement with the commercially available ones. The thermal diffusivity was measured using the so-called open photoacoustic cell method.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 35, Times Cited: 9
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 139

Tipo da Referência	Journal Article
Autor	Leite, N. F. Franzan, A. H. Torres Filho, A. Miranda, L. C. M.
Título	Dielectric-constant, optical-transmission, and thermal-diffusivity monitoring of iodine-impregnated polystyrene films
Revista	Journal of Applied Polymer Science
Ano	1990
Volume	39
Número	6
Páginas	1361-1373
Palavras-Chave	Polystyrene films, Absorption coefficient, Thermal diffusivity
Resumo	A simple method for the iodine doping of atactic polystyrene films is described. The marked changes in the physical properties of the polystyrene films, such as dielectric constant, optical absorption coefficient, and thermal diffusivity, are presented as a function of the doping time. The results show strong evidences of the onset of an order-disorder transition as a function of the doping time
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 29, Times Cited:4
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 140

Tipo da Referência	Journal Article
Autor	Mansanares, A. M. Bento, A. C. Vargas, H. Leite, N. F. Miranda, L. C. M.
Título	Photoacoustic measurement of the thermal properties of two-layer systems
Revista	Physical Review B
Mês	Sep.
Ano	1990
Volume	42
Número	7
Páginas	4477-4486
Palavras-Chave	Thotoacoustic techniques, Thermal diffusivity
Resumo	Using two different photoacoustic techniques for a two-layer system of variable thickness, we show that the thermal diffusivity and the thermal conductivity are completely determined, based upon the effective-sample model widely used in heat-transfer problems. A procedure to establish a standard photothermal technique for measuring both the thermal diffusivity and the thermal conductivity is also discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 27, Times Cited: 48
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Fisica, Universidade Estadual de Campinas Laboratorio Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 141

Tipo da Referência	Journal Article
Autor	Rodrigues, N. A. S. Miranda, L. C. M.
Título	Thermoelectric amplification of acoustic waves observed in Ni using optical-beam-deflection detection
Revista	Physical Review B
Mês	July
Ano	1990
Volume	42
Número	2
Páginas	1177-1182
Palavras-Chave	temperature gradient, optical-probe-beam deflection
Resumo	The onset of the spectrally resolved acoustic-wave instability in Ni in the presence of a temperature gradient is observed. The detection technique used is the noncontact optical-probe-beam deflection.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI:Cited Reference, Times Cited: 1
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Estudos Avançados, Centro Técnico Aeroespacial Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 142

Tipo da Referência	Journal Article
Autor	Marquezini, M V Cella, N Mansanares, A M Vargas, H Miranda, L. C. M.
Título	Open photoacoustic cell spectroscopy
Revista	Measurement Science and Technology
Mês	Apr.
Ano	1991
Volume	2
Número	4
Páginas	396-401
Palavras-Chave	Photoacoustic spectroscopy
Resumo	The possibility of using a minimal-volume photoacoustic cell to perform spectroscopy of samples is discussed. It is shown that this alternative signal-to-noise-enhanced photoacoustic configuration allows one to obtain both absorption and transmission spectra with minimal experimental arrangement and cell machining requirements. The theoretical model is presented, the use of which is exemplified by a complete optical and thermal characterization of leaves.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:24 , Times Cited:59
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Fisica, Universidade Estadual de Campinas Laboratbrio Associado de Sensores e Materiais, lnstituto de Pesquisas Espaciais

art. 143

Tipo da Referência	Journal Article
Autor	Pinto Neto, A. Vargas, H. Miranda, L. C. M.
Título	Amorphization of ion-implanted layers in silicon using photoacoustic detection
Revista	Applied Physics Letters
Mês	Feb.
Ano	1991
Volume	58
Número	5
Páginas	496-498
Palavras-Chave	Thermal properties, Temperature
Resumo	The influence of ion implantation in the thermal properties of silicon wafers at room temperature is investigated using the photoacoustic technique. It is suggested that the observed decrease of the values of both thermal diffusivity and conductivity, as the implantation dose increases, is due to the amorphization of the implanted layer.
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cieted Reference:11, Times Cited:7
Área	FISMAT
Afiliação	Instituto de Fisica, Universidade Estadual de Campinas Instituto Politécnico do Rio de Janeiro

art. 144

Tipo da Referência	Journal Article
Autor	Leite, N. F. Miranda, L. C. M.
Título	Photoacoustic characterization of the effects of air inclusion on the thermal-properties of foamed polyurethane
Revista	Journal of Materials Science
Mês	Oct.
Ano	1992
Volume	27
Número	20
Páginas	5449-5452
Repositório	<sid.inpe.br/marciana/2003/04.29.11.07>
Palavras-Chave	photo-acoustic determination, diffusivity, solids, film
Resumo	The usefulness of the open photoacoustic cell technique for investigating the effects of air inclusions on the thermal properties of foamed polyurethane is demonstrated. It is shown that the thermal diffusivity and thermal expansion coefficients increase with decreasing values of the resin to catalyst ratio, which corresponds to greater air inclusion in the resin.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:23 , Times Cited:7
Área	FISMAT
Grupo	LAS
Afiliação	Instituto Nacional de Pesquisas Espaciais, Laboratório Associados de Sensores e Matriais Instituto Politécnico do Rio de Janeiro

art. 145

Tipo da Referência	Journal Article
Autor	Leite, N. F. Miranda, L. C. M.
Título	Thermal Property measurements of liquid samples using photoacoustic detection
Revista	Review of Scientific Instruments
Mês	Oct.
Ano	1992
Volume	63
Número	10
Páginas	4398-4402
Palavras-Chave	Thermal properties, Liquids
Resumo	In this paper we describe the use of so-called open-photoacoustic cell (OPC) for thermal characterization of transparent liquid samples. The samples used to demonstrate the usefulness of the OPC configuration are water, glycerol, and diffusion pump oil.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 17, Times Cited: 8
Área	FISMAT
Grupo	LAS
Afiliação	Laboratório Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais

art. 146

Tipo da Referência	Journal Article
Autor	Lima, J. C. de Cella, N. Miranda, L. C. M. Chen, Y. A. Franzan, A. H. Leite, N. F.
Título	Photoacoustic characterization of chalcogenide glasses: Thermal diffusivity of GexTe1-x
Revista	Physical Review B
Mês	Dec.
Ano	1992
Volume	46
Número	21
Páginas	14186-14189
Palavras-Chave	photoacoustic technique, thermal diffusivity
Resumo	The photoacoustic technique is used to investigate the thermal diffusivity of GexTe1-x glasses as a function of composition. The observed dependence on the composition is explained on the basis of the chemically ordered network model. This interpretation is further supported by x-ray and electrical resistivity measurements.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 37, Times Cited: 6
Área	FISMAT
Grupo	LAS
Afiliação	Instituto Politécnico do Rio de Janeiro Laboratório de Sensores e Materiais, Instituto de Pesquisas Espaciais

art. 147

Tipo da Referência	Journal Article
Autor	Pereira, A. C. Zerbetto, M. Silva, G. C. Vargas, H. Silva, W. J. da Neto, G. de O. Cella, N. Miranda, L. C. M.
Título	OPC technique for in vivo studies in plant photosynthesis research
Revista	Measurement Science and Technology
Mês	Sep.
Ano	1992
Volume	3
Número	9
Páginas	931-934
Palavras-Chave	photoacoustic technique
Resumo	The open photoacoustic cell (OPC) technique is applied to photosynthesis research in leaves, where the leaf is still attached to the plant. It is shown that real in situ and in vivo measurements of photosynthetic activities in leaves can be performed. The dehydration effect after cutting the leaf from the plant was monitored and some qualitative measurements related to photosynthetic activities are reported in order to show the usefulness of this technique in this field.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:15 , Times Cited:13
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas Instituto Politécnico do Rio de Janeiro Laboratório de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais

art. 148

Tipo da Referência	Journal Article
Autor	Miranda, L. C. M. Cella, N.
Título	Evaporation and contraction of a droplet that wets a surface monitored by photoacoustic detection
Revista	Physical Review B
Mês	Feb.
Ano	1993
Volume	47
Número	7
Páginas	3896-3903
Palavras-Chave	Evaporation, Flat metallic surface, Photoacoustic detection
Resumo	The evaporation and contraction of a droplet wetting a flat metallic surface is monitored using photoacoustic detection. The results are interpreted in terms of an effective backing model together with the lubrication theory for droplet dynamics.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 16, Times Cited: 8
Área	FISMAT
Grupo	LAS
Afiliação	Laboratorio Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais Instituto Politecnico do Rio de Janeiro

art. 149

Tipo da Referência	Journal Article
Autor	Silva, W. J. da Vidal, B. C. Martins, M. E. Q. Vargas, H. Pereira, A. C. Zerbetto, M. Miranda, L. C. M.
Título	What makes popcorn pop
Revista	Nature
Mês	Apr.
Ano	1993
Volume	362
Número	6419
Páginas	417
Palavras-Chave	Zea , Mays
Resumo	Corn and popcorn belong to the same plant species Zea mays mays , but only popcorn pops. Previous studies on this question have been restricted to popcorn fruits and have demonstrated that pericarp (hull) and starch are important for popping.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:6 , Times Cited:5
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Campinas, Instituto de Física e Biologia Instituto de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 150

Tipo da Referência	Journal Article
Autor	Pereira, A. C. Neto, G. O. Vargas, H. Cella, N. Miranda, L. C. M.
Título	On the use of the open photoacoustic cell technique for studying photosynthetic O2 evolution of undetached leaves: Comparison with Clark-type O2 electrode
Revista	Review of Scientific Instruments
Mês	May
Ano	1994
Volume	65
Número	5
Páginas	1512-1516
Palavras-Chave	photoacoustic cell technique
Resumo	The leaf photosynthetic O2 evolution detected by the open photoacoustic cell (OPC) technique is compared to the measurements using a Clark-type O2 electrode detector. In vivo and in situ measurements were carried out with undetached maize leaves. From the correlation between these two methods the possibility of a calibration is proposed for the oxygen evolution OPC signal.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:12 , Times Cited:7
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Física, Universidade Estadual de Campinas Instituto Politécnico, Universidade Estadual do Rio de Janeiro Laboratório Associado de Sensores e Materiais, Instituto de Pesquisas, Espaciais

art. 151

Tipo da Referência	Journal Article
Autor	Silva, M. D. da Miranda, L. C. M.
Título	Modifications of the dielectric and thermal properties of vulcanized natural rubber due to iodine doping
Revista	Physical Review B
Mês	May
Ano	1994
Volume	49
Número	18
Páginas	12646-12655
Palavras-Chave	dielectric, thermal properties
Resumo	The marked changes in the dielectric and thermal properties of vulcanized cis-1,4-polyisoprene due to different iodine doping levels are investigated. The results show strong evidences of formation of conjugated sequences of unsaturated double bonds in the vulcanized polyisoprene backbone, through visible and infrared spectroscopic data. The dependence of the electrical conductivity, specific heat, and of the Young's modulus, upon doping, indicate the existence of a critical doping concentration for the onset of an order-disorder transition.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 36, Times Cited: 0
Área	FISMAT
Grupo	LAS
Afiliação	Laboratório Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais

art. 152

Tipo da Referência	Journal Article
Autor	Silva, W. J. da Prioli, L. M. Magalhães, A. C. N. Pereira, A. . Vargas, H. Mansanares, A. M. Cella, N. Miranda, L. C. M. Alvarado-Gil, J.
Título	Photosynthetic O2 evolution in maize inbreds and their hybrids can be differentiated by open photoacoustic cell technique
Revista	Plant Science
Ano	1995
Volume	104
Número	2
Páginas	177-181
Palavras-Chave	Heterosis; Maize; Zea mays L; Photosynthesis; Photoacoustic
Resumo	Photosynthetic efficiency is considered one of the traits potentially suitable to differentiate hybrids from their inbred lines. Previous evaluations concerning photosynthetic efficiencies of maize (Zea mays L.) plants in the field have shown inconsistent and contradictory data. In this work, we attempted to study photosynthetic O2 evolution through photo-acoustic spectroscopy in intact undetached leaves of dark-adapted seedlings of inbreds and their hybrids. The results indicate that photosynthetic efficiencies of inbreds and hybrids can be differentiated by photoacoustic measurements of oxygen evolution, providing a parameter that might prove useful in evaluating plant genotypes.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 13, Times Cited: 11
Área	FISMAT
Grupo	LAS
Afiliação	Instituto de Biologia, Universidade Estadual de Campinas Instituto de Biologia/CBMEG, Universidade Estadual de Campinas Instituto de Física, Universidade Estadual de Campinas Instituto Politécnico, Universidade do Estado do Rio de Janeiro Laboratório Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais Centro de Investigación y Estudios Avanzados, IPN

art. 153

Tipo da Referência	Journal Article
Autor	Yanezlimon, M. Rodriguez, M. E. Alvara do Gil, J. J. Zelayaangel, O. Sanchezsinencio, F. Cruz Orea, A. Vargas, H. Figueroa, J. D. C. Martinezbustos, F Martinez, J. L. Gonzalez Hernandez, J. Arguello, C. Miranda, L. C. M.
Título	Photoacoustic measurements of thermal-diffusivity and correlation with viscosity of instant corn dry masa flour
Revista	Analyst
Mês	July
Ano	1995
Volume	120
Número	7
Páginas	1953-1958
Palavras-Chave	Photoacoustic spectroscopy, Thermal properties , Instant corn masa, Lime content, Viscosity
Resumo	The usefulness of the photoacoustic technique for the characterization of thermal properties and for the monitoring of the pasting effect of added water and lime on instant corn masa flour is discussed. In particular, it is shown that the photoacoustically measured thermal diffusivity follows closely the change in the sample viscosity, as a function of the lime content.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:17 , Times Cited:10
Área	FISMAT
Grupo	LAS
Afiliação	Inst Politecn Ncl,Ctr Invest & Estudios Avanzados,Dept Fis., IPN,Ctr Invest & Estudios Avanzados,Programa Multidisciplinario Mat Avanzados Instituto Nacional Pesquisas Espaciais

art. 154

Tipo da Referência	Journal Article
Autor	Acosta-Avalos, D. Alvarado-Gil, J. J. Vargas, H. Frías-Hernández, J. Olalde-Portugal, V. Miranda, L. C. M.
Título	Photoacoustic monitoring of the influence of arbuscular mycorrhizal infection on the photosynthesis of corn (Zea mays L.),
Revista	Plant Science
Mês	Sep.
Ano	1996
Volume	119
Número	1-2
Páginas	183-190
Repositório	<sid.inpe.br/marciana/2003/04.28.15.42>
Palavras-Chave	Fungus colonization; Oxygen evolution; Photoacoustic technique
Resumo	The general utility of the photoacoustic effect is demonstrated by examining in vivo and in situ, for the first time, the influence of arbuscular mycorrhizal infection on the photosynthetic activity of intact maize leaves. Experiments correlating the photosynthetic O2 evolution, after a dark induction period, through the photoacoustic effect in mycorrhizal and non-mycorrhizal maize plants with their field performance show very consistent data. The influence of the arbuscular mycorrhizal infection on the photosynthetic efficiency is discussed. This methodology opens the possibility for early evaluation of the effect of fungi symbiotic adaptation with maize plants. For the arbuscular mycorrhizal-maize plant system, photoacoustics represents an extremely helpful technique for discarding low performance materials.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 18, Times Cited: 5
Área	FISMAT
Grupo	LAS
Afiliação	Departamento de Fisica, Centro de Investigación y Estudios Avanzados del IPN, Mexico Programa Multidisciplinario en Ciencias Aplicada y Tecnologia Avanzada, Centro de Investigatión y de Estudios Avanzados del IPN, Mexixo Instituto Nacional de Pesquisas Espaciais

art. 155

Tipo da Referência	Journal Article
Autor	Balderas-López, J. A. Gutiérrez-Juárez, G. Alvarado-Gil, J. J. Frías-Hernández, J. Olalde-Portugal, V. Miranda, L. C. M. Silva, M. D. Delgadillo, I. Vargas, H.
Título	A new CO2 analyzer for measuring respiration rates in organic material
Revista	Review of Scientific Instruments
Mês	Oct.
Ano	1996
Volume	67
Número	10
Páginas	3732-3736
Palavras-Chave	organic material
Resumo	In this article, we present a new CO2 analyzer which can be used for monitoring respiration rates in organic material. To demonstrate the potentiality of the analyzer, CO2 evolution of soil samples collected from three different edaphic environments were measured. The results obtained with this compact CO2 analyzer were compared with those carried out simultaneously using the chemical method, and the correlation between them has been established.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:12 , Times Cited:1
Área	FISMAT
Grupo	LAS
Afiliação	Depto. de Física, CINVESTAV-IPN CINVESTAV-IPN, Unidad Irapuato Laboratorio de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais PMCATA, CINVESTAV-IPN

art. 156

Tipo da Referência	Journal Article
Autor	Cruz-Orea, A. Delgadillo, I. Vargas, H. Pichardo, J. L. Alvarado-Gil, J. J. Miranda, L. C. M.
Título	On the use of the photoacoustic technique for the measurement of the thermomechanical properties of semiconductor two-layer systems
Revista	Solid State Communications
Mês	Dec.
Ano	1996
Volume	100
Número	12
Páginas	855-859
Palavras-Chave	Semiconductors; Heat conduction; Thermal expansion
Resumo	The photoacoustic technique is used in semiconductor two-layer systems for the determination of thermal properties and thermal expansion coefficient. The two-layer systems studied were amorphous silicon-glass and Al0.2Ga0.8As-GaAs. Our results show that the proposed method is a reliable technique for the characterization of other semiconductor two-layers systems.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 11, Times Cited: 0
Área	FISMAT
Grupo	LAS
Afiliação	Programa Multidisciplinario de Ciencias Aplicadas y Tecnología Avanzada, Centro de Investigatión y de Estudios Avanzados del IPN, Mexico Departamento de Física, Centro de Investigación y de Estudios Acanzados del IPN Instituto Nacional de Pesquisas Espaciais

art. 157

Tipo da Referência	Journal Article
Autor	Rodriguez, M. E. YanezLimon, M. Alvarado Gil, J. J. Vargas, H. Sanchez Sinencio, F. Figueroa, J. D. C. Martinez Bustos, F. Martinez Montes, J. L. GonzalezHernandez, J. Silva, M. D. Miranda, L. C. M.
Título	Influence of the structural changes during alkaline cooking on the thermal, rheological, and dielectric properties of corn tortillas
Revista	Cereal Chemistry
Mês	Sep.-Oct.
Ano	1996
Volume	73
Número	5
Páginas	593-600
Palavras-Chave	Photoacoustic measurement, Diffusivity, Starch, Water, Crystallization
Resumo	Basic data on thermal, dielectric, and infrared spectra properties of cooked tortillas were investigated with the aim of understanding the role of lime, Ca(OH)(2), that is incorporated during the alkaline cooking process. The data are further supplemented by X-ray diffraction and texture measurements. The changes in the thermal diffusivities, as measured by the photoacoustic technique, as well as changes in texture, X-ray patterns, dielectric, and infrared spectra properties are presented as a function of the lime concentration. The results show strong evidence that there is a marked concentration of lime at approximate to 0.2% above and below where there are different behavior patterns of the measured properties of tortilla. In particular, the results of the study of dielectric constants and thermal diffusivity provide strong evidence for an enhancement of the starch crosslinking taking place at a lime content of approximate to 0.2%.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:31 , Times Cited:9
Área	FISMAT
Grupo	LAS
Afiliação	Inst. Politecn. Nacl., Ctr. Invst & Estudios Avanzados Dept. Fis, Univ Autonoma Queretaro,Fac. Quim.,Lab. Invest. Mat. Laboratório de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais

art. 158

Tipo da Referência	Journal Article
Autor	Alvarado-Gil, J. J. Vargas, H. Sanchez Sinencio, F. Gonzalez Hernandez, J. Miranda, L. C. M.
Título	Effect of lime content on the processing conditions of cooked maize tortillas: Changes of thermal, structural, and rheological properties
Revista	Optical Engineerig
Mês	Feb.
Ano	1997
Volume	36
Número	2
Páginas	348-357
Palavras-Chave	Photoacoustic, photothermal science, engineering, lime, biopolymers, thermal diffusivity measurements, x-ray
Resumo	Basic data on thermal, dielectric, and IR spectral properties of cooked tortillas were investigated with the major aim to understand the role of lime, Ca(OH)(2), incorporated during the alkaline cooking process. The data are further supplemented by x-ray diffraction and texture measurements. The changes in the thermal diffusivities, measured by the photoacoustic technique, as well as the changes in texture, x-ray patterns, dielectric, and IR spectral properties are presented as a function of the lime concentration. The results show strong evidence that there is a marked concentration of lime (around 0.2%) above and below which different behavior patterns of the measured properties of tortilla were observed. in particular, the results for the dielectric constant and thermal diffusivity provide strong evidences for enhanced starch crosslinking taking place for lime content close to 0.2%.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 28, Times Cited: 5
Área	FISMAT
Grupo	LAS
Afiliação	Inst. Politecn Nalc, CTR Invest and Estudios Avanzados, PMCATA, Mexico Univ Autonom Queretaro, Lab. Invest Mat, Quim, Mexico Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 159

Tipo da Referência	Journal Article
Autor	Calderón, A. Alvarado-Gil, J. J. Gurevich, Yu. G. Cruz-Orea, A. Delgadillo, I. Vargas, H. Miranda, L. C. M.
Título	Photothermal Characterization of Electrochemical Etching Processed n-Type Porous Silicon
Revista	Physical Review Letters
Mês	Dec.
Ano	1997
Volume	79
Número	25
Páginas	5022-5025
Palavras-Chave	temperature, Electrochemically, Porous silicon material
Resumo	The room temperature thermal diffusivity evolution of electrochemically formed porous silicon as a function of the etching time is investigated. The measurements were carried out using the open-cell photoacoustic technique. The experimental data were analyzed using a composite two-layer model. The results obtained strongly support the existing studies, indicating the presence of a high percentage of SiO2 in the composition of porous silicon material.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 21, Times Cited: 15
Área	FISMAT
Grupo	LAS
Afiliação	Departimento de Fisica, CINVESTAV-IPN Laboratorio de Ciencias Fisicas, Universidade Estadual do Norte Fluminense Laboratorio de Sensores e Materials, Instituto Nacional de Pesquisas Espaciais

art. 160

Tipo da Referência	Journal Article
Autor	Delgadillo, I. Cruz-Orea, A. Vargas, H. Calderón, A. Alvarado-Gil, J. J. Miranda, L. C. M.
Título	Photoacoustic technique for monitoring the thermal properties of porous silicon
Revista	Optical Engineerig
Mês	Feb.
Ano	1997
Volume	36
Número	2
Páginas	343-347
Palavras-Chave	Photoacoustic technique, Thermal properties, Porous silicon
Resumo	The use of the photoacoustic technique to monitor the thermal properties of materials that can be obtained only as parts of multicomponent samples is illustrated by performing the thermal characterization of two porous materials: porous silicon obtained from n-type crystalline silicon through the spark process and that obtained through the electrochemical etching method. This nonseparative, and hence nondestructive, approach makes use of an effective thermal diffusivity treatment based on the analogy between thermal and electrical resistances, in combination with simplified compositional models for the corresponding multicomponent systems. The thermal parameters obtained are in agreement with existent studies concerning the composition of these materials. This approach offers the possibility of performing the thermal characterization of other porous semiconductors and analogous materials.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 26, Times Cited: 4
Área	FISMAT
Grupo	LAS
Afiliação	Inst. Politecn Nalc, CTR Invest and Estudios Avanzados, PMCATA, Mexico Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais

art. 161

Tipo da Referência	Journal Article
Autor	Veleva, L. Tomás, S. A. Marín, E. Cruz-Orea, A. Delgadillo, I. Alvarado-Gil, J. J. Quintana, P. Pomés, R Sánchez, F. Vargas, H. Miranda, L. C. M.
Título	On the use of the photoacoustic technique for corrosion monitoring of of metals: Cu an Zn oxides formed in tropical envirnments
Revista	Corrosion Science
Mês	Sep.
Ano	1997
Volume	39
Número	9
Páginas	1641-1655
Palavras-Chave	Zinc, Atmospheric Corrosion, Copper patinas, Differential reflectometry, Thermal diffusivity, X-ray, Atmosphere, Spectroscopy
Resumo	Samples of electrolytical copper and zinc were exposed for nine months to a naturally occurring marine environment of the Yucatan Peninsula in Mexico and were analysed without any additional pretreatment. The study is mainly based upon the measurements of the samples thermal properties by using the non-destructive photoacoustic technique. The thermal diffusivity may determine with a conventional open photoacoustic cell and the thermal effusivity using a new experimental configuration.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 38, Times Cited: 4
Área	FISMAT
Grupo	LAS
Afiliação	Depto. de Física Aplicada, CINVESTAV-Mérida, PMCATA, CINVESTAV-México Instituto Nacional de Pesquisas Espaciais

art. 162

Tipo da Referência	Journal Article
Autor	Almeida, J. R. M. Cella, N. Monteiro, S. N. Miranda, L. C. M.
Título	Thermal diffusivity of an epoxy system as a function of the hardener content
Revista	Journal of Applied Polymer Science
Ano	1998
Volume	69
Número	7
Páginas	1335-1341
Palavras-Chave	Epoxy resin, Thermal diffusivity, Photoacoustic, Open photoacoustic cell technique
Resumo	The influence on the thermal diffusivity of the changes induced on the macromolecular network of an epoxy-amine system by different hardener/resin ratios was experimentally investigated. For each hardener/resin ratio, the open photoacoustic cell technique was used to measure the thermal diffusivity. The thermal diffusivity data was correlated with the evolution of the characteristic infrared absorption bands of the epoxy and amine components using a fast Fourier transform spectrometer. The results show a sharp transition in the thermal diffusivity values at the beginning of the amine-rich domain, corresponding to a transformation from a rigid network to an amine saturated deformable structure. It is concluded that the open photoacoustic cell technique can be a useful monitoring tool for structural characterization and molecular evolution during the curing of this kind of system.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:26 , Times Cited:4
Área	FISMAT
Grupo	LAS
Afiliação	Departamento de Ciência dos Materiais e Metalurgia, Pontificia Universidade Católica do Rio de Janeiro Instituto Politécnico, Universidade do Estado do Rio de Janeiro Centro de Ciência e Tecnologia, Universidade Estadual do Norte Fluminense Laboratório Associado de Sensores e Materiais,Instituto Nacional de Pesquisas Espaciais (INPE)

art. 163

Tipo da Referência	Journal Article
Autor	Guarcia-Quiroz, A. Tomas, S A Vargas, H Cruz-Orea, A Alvarado-Gill, J. J. Velava, L. Miranda, L. C. M.
Título	Photoacoustic spectroscopy of corrosion products of copper formed in tropical environments
Revista	Instrumentation Science and Technology
Ano	1998
Volume	26
Número	2-3
Páginas	241-260
Palavras-Chave	Differential reflectrometry, Thermal diffusivity, X-ray, Atmosphere, Patina, NAZN4CL(OH)6SO4.6H2O, ZN4CL2(OH)4SO4.5H2O, glasses, samples, zincs
Resumo	The evolution of thermal properties of copper samples, as a function of exposure time to a corroding atmosphere, is investigated in detail. The samples were exposed to a natural marine environment of the Yucatan Peninsula in Mexico and were analyzed without any additional pretreatment. The study is mainly based upon the measurements of thermal and optical properties of the sample, using the non-destructive photoacoustic technique. The thermal diffusivity was measured with a conventional open photoacoustic cell arrangement, whereas the thermal effusivity was determined using a new experimental configuration.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:45 , Times Cited:2
Área	FISMAT
Grupo	LAS
Afiliação	IPN, CNVESTAV, Dept. Fís. Mexico IPN, CNVESTAV,PMCATA Mexico IPN, CNVESTAV, Dept. Fís Aplicada Mexico Instituto de Pesquisas Espaciais, Laboratório Asssociado de Sensores e Materiais

art. 164

Tipo da Referência	Journal Article
Autor	Tomás, S. A. Sammiguel, R. E. Cruz-Orea, A Gomes da Silve, M. Sthel, M. S. Vargas, H. Miranda, L. C. M.
Título	Photoacoustic detection of water vapour permeability in ZrO2-TiO2 ceramic
Revista	Measurement Science and Technology
Mês	May
Ano	1998
Volume	9
Número	5
Páginas	803-808
Palavras-Chave	Thermal-diffusive, Volatile liquid, Solis, Signal, Enhancement, Cell, Gas
Resumo	The photoacoustic detection of water vapour permeability in solids is discussed. We propose a new experimental configuration in which the photoacoustic heat source is located at the cell’s optical entrance window, rather than at the sample–transducer gas interface. It is claimed that only the sample permeability property is experimentally accessed in the new configuration. The experimental arrangement is tested by measuring the water vapour permeability of a ZrO2–TiO2 ceramic sample. In these measurements we were able to detect changes in the air molar concentration of water as small as 1.1%, with a resolution better than 0.5%, corresponding to the lowest relative humidity used in our measurements.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:25 , Times Cited:2
Área	FISMAT
Afiliação	Departamento de Física, Centro de Investigacíon y Estudios Avanzados del IPN, Mexico Laboratório de Ciências Físicas,m Centro de Ciências e Tecnologia, Universidade Estadual do Norte Fluminense Departamento de Física, Universidade de Concepción, Chile

art. 165

Tipo da Referência	Journal Article
Autor	Baesso, M. L. Bento, A. C. Duarte, A. R. Neto, A. M. Miranda, L. C. M. Sampaio, J. A. Catunda, T. Gama, S. Gandra, F. C. G.
Título	Nd2O3 doped low silica calcium aluminosilicate glasses: thermomechanical properties
Revista	Journal of Applied Physics
Mês	June
Ano	1999
Volume	85
Número	12
Páginas	8112-8118
Palavras-Chave	Thermal-diffusivity, Aluminate glasses, Thermomechanical properties
Resumo	The effects of Nd2O3 doping on the thermal and mechanical properties of vacuum melted, low silica, calcium aluminosilicate glasses are presented. For the doped glasses, the vitrification limit was found to correspond to a maximum load of 5 wt %Nd2O3. The influence of the rare earth doping on the thermal diffusivity, thermal conductivity, and Vickers hardness was such that all these physical parameters decreased by roughly the same amount, namely 8%, between the undoped and the 5 wt % doped sample. The dependence of these parameters, as a function of the Nd2O3 doping, strongly supports the idea that the Nd3+ act as network modifiers.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited reference: 27, Times Cited: 21
Área	FISMAT
Afiliação	Universidade Estadual Maringa, Departamento de Fisíca Universidade de Sao Paulo, Instituto Física Sao Carlos Universidade Estadual Campinas, Instituto de Física

art. 166

Tipo da Referência	Journal Article
Autor	Frias-Hernandez, J. T. Aguilar-Ledezma, A. L. Olalde-Portugal, V. Balderas-Lopez, J. A. Gutierrez-Juarez, G. Alvarado-Gil, J. J. Castro, J. J. Vargas, H. Albores, A. Dendooven, L. Balderas-Lopez, J. A. Miranda, L. C. M. Frias-Hernandez, J. T.
Título	Soil characteristics in semiarid highlands of central Mexico as affected by mesquite trees (Prosopis laevigata)
Revista	Arid Soil Reseaarch and Rehabilitation
Mês	July-Set.
Ano	1999
Volume	13
Número	3
Páginas	305-312
Repositório	<sid.inpe.br/marciana/2003/05.02.12.42>
Palavras-Chave	fertility islands, leguminous tree, soil microflora, soil nutrients
Resumo	In the semiarid highlands of central Mexico the mesquite tree (Prosopis laevigata) is often removed for agricultural and forestry purposes. Clearing of land for agricultural purposes has a significant impact on soil processes and nutrient dynamics and, ultimately, on crop production. We have studied the effect of the mesquite tree on soil respiration, amounts of bacteria, fungi, and actinomycetes, and soil characteristics. Soil was sampled from three distinct locations: under the canopy of the mesquite tree, in the area surrounding the mesquite tree but not covered by its canopy, and in adjacent cultivated land. It was found that the mesquite tree plays an important role in nutrient cycling in arid and semiarid regions. Soil microorganisms and nutrients (N, P, and Fe) were more abundant under the canopy of the mesquite tree than in the surrounding area and in the adjacent arable soil.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:26 , Times Cited:1
Área	FISMAT
Afiliação	Inst Politecn Nacl, Ctr Invest & Estudios Avanzados Dept Biotechnol & Bioengn, PN, CINVESTAV, Dept Biochem & Biotechnol, Unidad Iraputo

art. 167

Tipo da Referência	Journal Article
Autor	Lima, S. M. Catunda, T. Lebullenger, R. Hernandes, A. C. Miranda, L. C. M. Baesso, M. L. Bento, A. C.
Título	Temperature dependence of thermo-optical properties of fluoride glasses determined by thermal lens spectrometry
Revista	Physical Review B
Mês	Dec.
Ano	1999
Volume	60
Número	22
Páginas	15173-15178
Palavras-Chave	Thermooptical effects, Temperature, Fluoride glasses
Resumo	In this work we report on the use of the thermal lens spectrometry to determine the absolute values of thermal diffusivity, thermal conductivity, and temperature coefficient of optical path-length change of several fluoride glasses. The results showed that flouride glasses doped with minor quantities of Ga, In, and Zn exhibit thermal conductivities and thermal diffusivities roughly 20% larger than that of fluorozirconate (ZBLAN) glasses, whereas their temperature coefficients for the optical path-length change was found to be 50% smaller. This suggests that these fluoride glasses may be considered as promising candidates for high power laser applications. We have also demonstrated how this technique can be used for the complete thermo-optical properties characterization as a function of temperature.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 23, Times Cited: 23
Área	FISMAT
Afiliação	Instituto de Física de São Carlos Departamento de Física, Universidade Estadual de Maringá

art. 168

Tipo da Referência	Journal Article
Autor	Sampaio, J. A. Catunda, T. Gandra, F. C. G. Gama, S. Bento, A. C. Miranda, L. C. M. Baesso, M. L.
Título	Structure and properties of water free Nd2O3 doped low silica calcium aluminate glasses
Revista	Journal of Non-Crystalline Solids
Mês	May
Ano	1999
Volume	247
Páginas	196-202
Palavras-Chave	Aluminate glasses, Spectroscopic properties, ND3,
Resumo	In this work, Nd2O3 doped low silica calcium aluminate glasses have been melted under vacuum conditions. Measurements of thermal diffusivity, density, optical absorption coefficient, glass transformation temperature (T-g), crystallisation temperature (T-x), dilatometric softening temperature (T-d) and Vickers microhardness have been carried out. The results provided information about the sample's structure and showed that for Nd2O3 concentration up to 5 wt% there was no devitrification of the samples. The decrease in hardness and thermal diffusivity was about 8%, while the density increased about 8% with the increasing concentration of Nd2O3. The thermomechanical properties combined with their quantum efficiency indicate that this material is a candidate for an active medium for solid-state lasers.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 27 , Times Cited: 9
Área	FISMAT
Afiliação	Universidade Estadual Maringa, Depatamento de Físicas Universidade Sao Paulo, Instituto de Física Sao Carlos, Grp Espectroscopia Solidos Universidade Estadual Campinas, Instituto de Física Gleb Wataghin

art. 169

Tipo da Referência	Journal Article
Autor	Sousa, D. F. de Zonetti, L. F. C. Bell, M. J. V. Sampaio, J. A. Nunes, L. A. O. Baesso, M. L. Bento, A. C. Miranda, L. C. M.
Título	On the observation of 2.8 µm emission from diode-pumped Er3 + - and Yb3 + -doped low silica calcium aluminate
Revista	Applied Physics Letters -- Applied Physics Letters
Mês	Feb.
Ano	1999
Volume	74
Número	7
Páginas	908-910
Palavras-Chave	Photoluminescence, Aluminante glasses
Resumo	In this letter, we investigate the midinfrared photoluminescence of a series of diode-pumped Er3 + -doped and Er3 + , Yb3 +-codoped low-silica content aluminosilicate glasses. Emission at 2.8 µm was observed in both single doped and codoped samples. The effect of Yb3 + codoping of the Er3 + -doped samples was such that, for example, for a 2 wt % Er3 +-doped, the photoluminescence yield at 2.8 µm was found to be roughly three times larger than that of the single 2 wt % Er3 + -doped sample. This behavior was attributed to the efficient sensitization of Er3 + by Yb3 + in our oxide based host glasses. The results reported in this letter, together with the outstanding mechanical, chemical, and thermal properties of these glasses, suggest that rare-earth doped calcium aluminate glasses may become an attractive host for the development of solid state lasers operating in the midinfrared.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 11, Times Cited: 7
Área	FISMAT
Afiliação	Instituto de Física de São Carlos, Universidade de São Paulo Departamento de Física, Universidade Estadual de Maringá

art. 170

Tipo da Referência	Journal Article
Autor	Baesso, M. L. Bento, A. C. Miranda, L. C. M. Souza, D. F. de Sampaio, J. A. Nunes, L. A. O.
Título	Rare-earth doped low silica calcium aluminosilicate glasses for near and mid Infrared applications
Revista	Journal of Non-Crystalline Solids
Mês	Oct.
Ano	2000
Volume	276
Número	1-3
Páginas	8-18
Palavras-Chave	Aluminate glasses, Thermomechanical properties, Phonons
Resumo	The combination of properties such as chemical durability, transformation temperature, thermo-mechanical properties, refractory properties, phonon energy of about 800 cm(-1) and infrared transparency up to 6 mu m, recommend low silica (<7 wt%) calcium aluminosilicate glasses as hosts for laser applications. We have been investigating the physical properties of these glasses prepared by melting under vacuum conditions. This preparation procedure ensured minimum in OH content in the low silica calcium aluminosilicate glass hosts with fluorescence quantum efficiency of about 0.92 and 2.8 mu m photoluminiscence, in samples co-doped with Er and Yb. In this paper, we review the thermal, mechanical and optical properties of these minimum OH content rare-earth-doped oxide glasses and discuss their potentials for near- and mid-infrared applications. Particular emphasis is given to the discussion of the new and promising optical properties of Er-Yb doped samples for biomedical applications.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:62 , Times Cited:1
Área	FISMAT
Afiliação	Universidade Estadual Maringa, Departamento de Física Universidade de Sao Paulo, Instituto de Física de Sao Carlos

art. 171

Tipo da Referência	Journal Article
Autor	Batista, J. A. Mansanares, A. M. Silva, E. C. da Vaz, C. C. Miranda, L. C. M.
Título	Contrast enhancement in the detection of defects in transparent layered structures: the use of optothermal interference technique in solar cell investigation
Revista	Journal of Applied Physics
Mês	Nov.
Ano	2000
Volume	88
Número	9
Páginas	5079-5086
Palavras-Chave	Enhanced sensitivity, Optothermal interference technique, Solar cell
Resumo	This article shows the enhanced sensitivity of the optothermal interference technique in the detection of local differences (nonhomogeneity in thickness and optothermal parameters), compared to the conventional optical interference, when investigating layered transparent structures. The measured signal is sensitive to the reflectance variation at the distinct interfaces, function of temperature, as well as to the optical phase lag between the reflected beams. Measurements made on solar cells show contrast of the order of 100% in the optothermal interference, while the conventional optical interference presents a contrast of only 15%. A model based on the reflectance variation at each interface describes the signal behavior as a function of modulation frequency. Theoretical calculation based on this model evidences the influence of the optothermal parameters in the signal contrast.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 18, Times Cited: 3
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual Campinas, Instituto de Fisica Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais Universidade Estadual Maringa, Departamento Fisica

art. 172

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Lima, M. B. S. Miranda, L. C. M. Baeza, J. Freer, J. Reyes, N. Ruiz, J Silva, M. D.
Título	Photoacoustic characterization of bleached wood pulp and finished papers
Revista	Measurement Science and Technology
Mês	May
Ano	2000
Volume	11
Número	5
Páginas	504-508
Repositório	<sid.inpe.br/marciana/2003/05.02.11.28.59>
Palavras-Chave	thermal diffusivity, photoacoustic effect, chemical bleaching, wood pulp, paper
Resumo	We have carried out photoacoustic measurements of the thermal diffusivity on samples of laboratory produced chemically bleached wood pulps, as well as on samples of several commercially available papers. Our results for bleached pulps indicate that the thermal diffusivity is correlated to each of the chemical bleaching controlling parameters (the kappa number, viscosity and brightness) measured during distinct phases of the bleaching processes. Also, the values of the thermal diffusivities for the commercial papers were found to be adequate for their end uses. It turned out that photoacoustic measurements can be a valuable research laboratory and/or industrial plant tool for comparing and controlling the properties of pulp and paper and for evaluating the effects of processing parameters upon these properties.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 22 , Times Cited: 6
Área	FISMAT
Grupo	LAS
Afiliação	Laboratorio de Termo-Óptica, Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Concepción, Chile Laboratorio de Recursos Renovables, Facultad de Ciencias Químicas, Universidad de Concepción, Chile Instituto Nacional de Pesquisas Espaciais

art. 173

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Lima, M. B. S. Oliva, R. Cardenas, G. Miranda, L. C. M.
Título	Photoacoustic assessment of oscillations in water vapor desorption from nanostructured catalytic surfaces
Revista	Chemical Physics Lettters
Mês	Dec.
Ano	2000
Volume	332
Número	5-6
Páginas	428-434
Palavras-Chave	Self-organization, Co oxidation, Adsorption, Surface
Resumo	In this Letter, we report on the short and long term dynamical behavior of water vapor sorption-desorption cycling on catalytic active nanoclustered Pd:Ag particles packed into compressed thin wafers. The water vapor desorption kinetics, following a hydration session, was monitored using conventional photoacoustic (PA) detection and relative humidity monitoring. It was found that the dehydration process was always accompanied by oscillations, with a period of the order of minutes. These observations are tentatively explained in terms of a PA model appropriate for damp porous materials in which we incorporated a term to describe these oscillations as arising from a competition between reactive sorption processes on the Pd:Ag surface.
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Concepcion Univ, Lab Procesamiento Termoopt Mat, Dept Fis, Fac Ciencias Exactas & Nat., Concepcion Univ, Dept Polimeros, Fac Ciencias Quim, Concepcion, Universidade Estadual Maringa, Departamento de Fisica
Tertiary Type	E WEBSCI: Cited Reference:23 , Times Cited:0
Área	FISMAT

art. 174

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Marín, E. Correa, O. Silva, M. G. da Cardoso, S. L. Gatts, C. Rezende, C. E. Vargas, H. Miranda, L. C. M.
Título	Measurement of the thermal properties of liquids using a thermal wave interferometer
Revista	Measurement Science and Technology
Mês	Oct.
Ano	2000
Volume	11
Número	10
Páginas	1522-1526
Palavras-Chave	Thermal properties, Liquids
Resumo	In this paper we discuss the use of an alternative photothermal technique for measurements of thermal properties of liquids. The proposed technique is based upon the concept of thermal wave interferometry. The liquid sample is confined between two thin pyroelectric detectors. One of these detectors acts as a modulated absorber of light while the other is used for sensing the temperature fluctuations transmitted through the liquid layer. The good agreement between the values of the thermal properties we got with the present technique and those reported in the literature demonstrates the capability of the technique for full characterization of the thermal properties of liquids.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:25 , Times Cited:8
Área	FISMAT
Afiliação	Universidade Estadual do Norte Fluminense Departamento de Física, Universidade Estadual de Maringá

art. 175

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Marín, E. Silva, M. G. da Sthel, M. S. Cardoso, S. L. Takeuti, D. F. Gatts, C. Vargas, H. Rezende, C. E. Miranda, L. C. M.
Título	On the use of the thermal wave resonator cavity sensor for monitoring hydrocarbon vapors
Revista	Review of Scientific Instruments
Mês	July
Ano	2000
Volume	71
Número	7
Páginas	2928-2932
Repositório	<sid.inpe.br/marciana/2003/04.29.11.34.44>
Resumo	A gas sensing device based on a thermal wave resonator cavity is outlined. It is experimentally tested by monitoring the presence of several hydrocarbon vapors in air via the measurement of the thermal diffusivity. It is also shown that its time-dependent response may be used to follow the vapor diffusion. It is shown that its characteristic response time is linearly correlated to the thermal diffusivity value of the mixture. The steps toward the development of a practical sensing device are further discussed.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Endereço de E-Mail	Centro de Ciência e Tecnología, Universidade Estadual do Norte Fluminense, Centro de Biología e Biotecnología, Universidade Estadual do Norte Fluminense, Departamento de Física, Universidade Estadual de Maringá
Tertiary Type	E WEBSCI: Cited Reference: 12, Times Cited:11
Área	FISMAT
Afiliação	Centro de Ciência e Tecnología, Universidade Estadual do Norte Fluminense Centro de Biología e Biotecnología, Universidade Estadual do Norte Fluminense Departamento de Física, Universidade Estadual de Maringá

art. 176

Tipo da Referência	Journal Article
Autor	Lima, S. M. Sampaio, J. A. Catunda, T. Bento, A. C. Miranda, L. C. M. Baesso, M. L.
Título	Mode-mismatched thermal lens spectrometry for thermo-optical properties measurement in optical glasses: a review
Revista	Journal of Non-Crystalline Solids
Mês	Aug.
Ano	2000
Volume	273
Número	1-3
Páginas	215-227
Palavras-Chave	Calcium, Aluminate glasses, Metal fluoride glasses, Aluminosilicate glasses
Resumo	In this work, the application of thermal lens spectrometry (TLS) to study thermo-optical and spectroscopic properties of optical glasses is described. The theoretical basis for quantitative measurements is discussed together with the advantages and limitations of the method as compared with conventional measurements. The technique is applied to determine the thermal diffusivities, temperature coefficient of optical path length changes, ds/dT, and the fluorescence quantum efficiencies of several glasses such as fluorides, chalcogenides, chalcohalides, soda lime and low silica calcium aluminosilicate. For some of these glasses, the effect of glass composition on thermo-optical properties was studied. For aluminosilicate glasses was observed an 8% decrease of the thermal diffusivity with the increase of Nd2O3 doping. Five kinds of fluoride glasses were studied and it was observed that fluorindate and fluoaluminate present better thermooptical properties compared to fluorozirconate glasses: thermal diffusivity similar to 20% higher and ds/dT similar to 50% lower (in modulus). All fluoride glasses had negative ds/dT and all the other glasses a positive ds/dT. For fluoride glasses, the TLS measurements were performed up to the glass transition temperature (T-g). Near T-g thermal diffusivity decreases and ds/dT increases, both by one order of magnitude. The TLS was used to determine fluorescence quantum efficiency and concentration quenching in Nd3+-doped glasses (aluminosilicate and fluorozirconate). These results were compared with the Judd-Ofelt calculations.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 51 , Times Cited: 13
Área	FISMAT
Afiliação	Universidade de Sao Paulo, Instituto de Física Sao Carlos Universidade Estadual Maringa, Departamento de Física

art. 177

Tipo da Referência	Journal Article
Autor	Sampaio, J. A. Catunda, T. Coelho, A. A. Gama, S. Bento, A. C. Miranda, L. C. M. Baesso, M. L.
Título	Thermo-mechanical and optical properties of calcium aluminosilicate glasses doped with Er3+ and Yb3+
Revista	Journal of Non-Crystalline Solids
Mês	Aug.
Ano	2000,
Volume	273
Número	1-3
Páginas	239-245
Palavras-Chave	Optical properties, Aluminate glasses, Absorption coefficient, Optical absorption, Thermomechanical properties
Resumo	In this work a series of Er2O3 and Yb2O3 doped and Er2O3–Yb2O3 co-doped low silica calcium aluminosilicate glasses have been melted at 1470°C under vacuum conditions. Measurements of optical absorption coefficient, mass density, refractive index, Vickers micro-hardness, glass transformation temperature (Tg) and crystallization temperature (Tx) have been carried out. The results showed that these glasses dissolved ~1.5 mol% Er2O3 and ~1.1 mol% Yb2O3 in their structure without devitrification and also that only small changes (~10%) have been measured in their thermal, mechanical and optical properties.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 32, Times Cited:2
Área	FISMAT
Afiliação	Instituto de Física de São Carlos, Universidade de São Paulo Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas Departamento de Física, Universidade Estadual de Maringá

art. 178

Tipo da Referência	Journal Article
Autor	Sousa D. F. Sampaio, J. A. Nunes, L. A. O. Baesso, M. L. Bento, A. C. Miranda, L. C. M.
Título	Energy transfer and the 2.8-mu m emission of Er3+- and Yb3+-doped low silica content calcium aluminate
Revista	Physical Review B
Mês	Aug.
Ano	2000
Volume	62
Número	5
Páginas	3176-3180
Repositório	<sid.inpe.br/marciana/2003/04.25.17.52>
Resumo	The 2.8-mu m emission of Er3+-doped low silica content calcium aluminate glasses sensitized by Yb3+ is investigated using conventional spectroscopy. The experimental data are quantitatively analyzed in terms of the energy transfer among the Yb3+ and Er3+ ions. The energy transfer rate by dipole-quadrupole mechanism was inferred to be larger than by dipole-dipole mechanism. Using the Dexter model of energy transfer, the microscopic parameters of energy transfer by dipole-dipole mechanism were calculated. It was found that the Yb3+--> Er3+ energy transfer constant is 2.6 times greater than the back-energy transfer.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cired Reference: 22, Times Cited: 2
Área	FISMAT
Afiliação	Universidade de Sao Paulo Instituto de Fisica, Universidade Estadual Maringa, Departamento de Fisica

art. 179

Tipo da Referência	Journal Article
Autor	Baesso, M. L. Pelisson, E. Rohling, J. H. Medina, A. N. Bento, A. C. Miranda, L. C. M. Lima, S. M. Sampaio, J. A. Catunda, T.
Título	Temperature dependence of thermo-optical properties of optical glasses determined by Thermal Lens Spectrometry
Revista	Analytical Sciences
Ano	2001
Volume	17
Número	Sp. Iss
Páginas	S106-S109
Palavras-Chave	Soda lime glass, Thermooptical properties, Simples, Aluminate glasses
Resumo	In this work we report on the use of thermal lens spectrometry to determine the temperature dependence of the thermo-optical properties, namely, thermal conductivity, thermal diffusivity, temperature coefficient of optical path length change and fluorescence quantum efficiency of ZBLAN and Nd2O3-doped low silica calcium aluminosilicate glasses. The results indicates that this technique can be used for the complete characterization of the thermo-optical properties of optical glasses as a function of temperature.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:13 , Times Cited:2
Área	FISMAT
Afiliação	Universidade Estadual de Maringa, Departamento de Física Instituto de Física de Sao Carlos

art. 180

Tipo da Referência	Journal Article
Autor	Batista, J. A. Mansanares, A. M. Silva, E. C. Vaz, C. C. Miranda, L. C. M.
Título	Optothermal interference technique applied to the investigation of transparent layered structures
Revista	Analytical Sciences
Ano	2001
Volume	17
Número	Sp. Iss
Páginas	S76-S79
Palavras-Chave	photothermal microscopy, diffusivity, temperature
Resumo	This papa shows the enhanced sensitivity of the optothermal interference technique in the detection of local differences (non-homogeneity in thickness and optothermal parameters), compared to the conventional optical interference, when investigating layered transparent structures. The measured signal is sensitive to the reflectance variation at the distinct interfaces, function of temperature, as well as to the optical phase lag between the reflected beams. Measurements made on solar cells show contrast of the order of 100% in the optothermal interference, while the conventional optical interference presents a contrast of only 15%. A model based on the reflectance variation at each interface describes the signal behavior as a function of modulation frequency.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference16 , Times Cited:0
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual Campinas, Instituto de Física Gleb Wataghin Instituto Nacional de Pesquisas Espaciais

art. 181

Tipo da Referência	Journal Article
Autor	Fontes, A. S. Bento, A. C. Miranda, L. C. M. Baesso, M. L.
Título	Thermal lens evaluation of the presence of adulterants in brewed coffee
Revista	Analytical Sciences
Ano	2001
Volume	17
Número	Sp. Iss
Páginas	S526-S529
Palavras-Chave	Soda lime glass, Soluble coffee, Thermooptical, Properties, Spectrometry, Dependence, Glasses
Resumo	In this work thermal lens spectrometry is applied to determine the thermo-optical properties and the presence of adulterants in brewed coffee. In addition, pll measurements were also performed. The results for dn/dT and pH data have shown that the combination of these two methods can be successfully applied to detect adulterants in brewed coffee.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:21 , Times Cited:1
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual Maringa, Departamento de Física Centro Federal Educação Tecnologica Parana

art. 182

Tipo da Referência	Journal Article
Autor	Lima, José A. P. Cardoso, Sergio L. Silva, Marcelo G. Sthel, Marcelo S. Gatts, Carlos E. N. Vargas, Helion Miranda, Luiz C. M.
Título	Thermal diffusivity as an automotive fuel characterization parameter: correlation with motor octane number
Revista	Industrial & Engineering Chemistry Research
Mês	Dec.
Ano	2001
Volume	40
Número	26
Páginas	6207 - 6212
Resumo	The standard method for evaluating the quality of automotive fuels is based on the determination of its motor octane number (MON) using the ASTM motor testing. The resulting figures of merit of this standard testing are known to be strongly linearly correlated to the fuels' vapor thermodynamic properties such as, for instance, their vapor pressure. In this paper we explore this strong correlation between the MON parameter and the fuels' vapor thermal properties to seek the development of an alternative low-cost method. The proposed method is based upon the photothermal measurement of the thermal diffusivity of the fuels' vapor in a closed air cell. It is found that the thermal diffusivity is well correlated with the corresponding MON values of the fuels investigated. The eventual improvements of the proposed method aimed at gaining accuracy and developing a portable device for field applications are also discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E> WEBSCI: Cited Reference: 18, Times Cited: 1
Área	FISMAT
Afiliação	Centro de Ciência e Tecnologia, Universidade Estadual do Norte Fluminense Departamento de Física, Universidade Estadual de Maringá

art. 183

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Marín, E. Silva, M. G. da Sthel, M. S. Schramm, D. U. Cardoso, S. L. Vargas, H. Miranda, L. C. M.
Título	Characterization of the thermal properties of gases using a thermal wave interferometer
Revista	Measurement Science and Technology
Mês	Nov.
Ano	2001
Volume	12
Número	11
Páginas	1949-1955
Palavras-Chave	Thermal properties, Gases, Thermal waves, Interferometer, Binary
Resumo	A method suitable for the thermal characterization of gases is described. It is based on thermal wave interference (TWI) in a cavity. A TWI device was constructed and the thermal diffusivity of different binary gas mixtures as a function of their relative concentration was measured. From these values, using a logarithm mixing model for the thermal conductivity of a two-phase gas system, the thermal properties of the corresponding pure gases were calculated. The data obtained for several test gases show good agreement with values reported in the literature.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:25 , Times Cited:1
Área	FISMAT
Afiliação	Centro de Ciencia e Tecnologia, Universidade Estadual do Norte Fluminense Departamento de Fisica, Universidade Estadual de Maringá

art. 184

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Marín, E. Massunaga, M. S. O. Correa, O. Cardoso, S. L. Vargas, H. Miranda, L. C. M.
Título	Measurement of the thermal properties of liquid mixtures using a thermal wave interferometer
Revista	Applied Physics B Lasers and Optics
Ano	2001
Volume	73
Número	2
Páginas	151-155
Palavras-Chave	Thermal properties, Liquids
Resumo	In this paper we discuss the use of an alternative photothermal technique for measurements of thermal properties of liquid mixtures. The proposed technique is based upon the concept of a thermal wave interferometer. The liquid sample is confined between two thin pyroelectric detectors. One of these detectors acts as a modulated light absorber while the other is used for sensing the temperature fluctuations transmitted through the liquid layer. It is demonstrated that the proposed experimental configuration allows us to fully characterize the thermal properties of the constituent liquids.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 30 , Times Cited: 1
Área	FISMAT
Grupo	LAS
Afiliação	Laboratório de Ciências Físicas, Universidade Estadual do Norte Fluminense Departamento de Física, Universidade Estadual de Maringá

art. 185

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Marín, E. Silva, M. G. da Sthel, M. S. Cardoso, S. L. Vargas, H. Miranda, L. C. M.
Título	Application of the thermal wave resonator to the measurement of the thermal diffusivity of gas mixtures
Revista	Review of Scientific Instruments
Mês	Feb.
Ano	2001
Volume	72
Número	2
Páginas	1580-1582
Repositório	<sid.inpe.br/marciana/2003/04.29.11.35>
Resumo	A gas analyzer device based on thermal wave interference in a cavity is presented. The thermal diffusivity of CO2:air mixtures as a function of the relative concentration is measured. It is demonstrated that different concentrations of CO2 in air can be detected with accuracy using the described experimental device. The results presented here open the possibility to perform routine measurements of thermal diffusivity of binary gas mixtures and using this parameter to monitor the relative gas concentration.
Site	<150.163.34.2:1914>
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 9, Times Cited:5
Área	FISMAT
Afiliação	Centro de Ciencia e Tecnologia, Universidade Estadual do Norte Fluminense Departamento de Física, Universidade Estadual de Maringá

art. 186

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Oliva, R. Cardenas, G. Silva, E. N. Miranda, L. C. M.
Título	Influence of the thermal annealing on the electrical resistivity and thermal diffusivity of Pd : Ag nanocomposites
Revista	Materials Lettters
Mês	Nov.
Ano	2001
Volume	51
Número	4
Páginas	357-362
Palavras-Chave	Nano-composites, Metal colloids, Thermal properties, Electrical resistivity, Porous materials
Resumo	In this paper, we report on the influence of thermal annealing on the electrical and thermal properties of nano-clustered Pd:Ag particles packed into compressed thin wafers. The nano-crystalline Pd:Ag compacts were prepared by solvent evaporation of non-aqueous metal colloids prepared by clustering of metal atoms in organic solvents at low temperature. Samples of Pd:Ag nano-clustered powder so obtained were then compressed into roughly 250 mum thick, 10 mm diameter wafers, and annealed at different temperatures, for about 1 h. The dependence of the electrical resistivity and of the thermal diffusivity of the resulting compacts on their corresponding annealing temperatures were investigated using a LCR impedance meter and a photoacoustic thermal diffusivity measurement apparatus. reserved
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:21 , Times Cited:1
Área	FISMAT
Afiliação	Laboratorio de Processamiento Termo-Optico de Materiales, Depto. Física, Faculdad de Ciencias Físicas y Matemáticas, Universidad de Concepcion, Chie Departamento de Polímeros, Facukdad de Ciencias Químicas, Universidad de Concepción, Chile Universidade Estadual Maringa, Departamento de Fisica

art. 187

Tipo da Referência	Journal Article
Autor	Mura, J. Miranda, L. C. M. Baesso, M. L. Bento, A. C. Rubira, A. F.
Título	Piezo- and pyroelectric photothermal characterization of polymers as a function of temperature
Revista	Journal of Applied Polymer Science
Ano	2001
Volume	82
Número	11
Páginas	2669-2678
Palavras-Chave	Thermal diffusivity, Photothermal techniques, Polymer aging, Glass transition, Poly(ethylene terephtalate)
Resumo	In this article, piezo- and pyroelectric signals are used for the photothermal characterization of the thermomechanical properties of polymers as a function of temperature. The potentialities of the proposed technique are explored using poly(ethylene terephthalate) as the test sample. The influence of the sample thermal aging on the polymer physical properties is also discussed. The sensitivity of the proposed photothermal technique is tested by comparing its results with complementary dielectric response measurements and X-ray diffraction.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:22 , Times Cited: 1
Área	FISMAT
Afiliação	Departamento de Física, Universidade Estadual de Maringá Departamento de Química, Universidade Estadual de Maringá

art. 188

Tipo da Referência	Journal Article
Autor	Olenka, L. Silva, E. N. da Santos, W. L. F. Muniz, E. C. Rubina, A. F. Cardoso, L. P. Medina, A. N. Miranda, L. C. M. Baesso, M. L. Bento, A. C.
Título	Evaluation of the thermophysical properties of modified and dyed poly(ethylene terephthalate) films
Revista	Journal of Physics D: Applied Physics
Mês	Aug.
Ano	2001
Volume	34
Número	15
Páginas	2248-2254
Palavras-Chave	Photoacoustic measurement, Thermal-diffusivity, Polyester fibers, Low-temperatures, Disperse dyes, glasses, Foils
Resumo	In this work we report thermal diffusivity and specific heat measurements in N,N-dimethylacrylamide modified poly (ethylene terephthalate) (PET) films for incorporating the dye blue Samaron HGS. These thermophysical properties were studied by changing the sample preparation conditions, such as the temperature and time of N,N-dimethylacrylamide treatment, and the time and temperature of dyeing. The results showed that the heat conduction was improved when the PET film was dyed at a temperature below the glass transition (T < 70 <degrees>C). On the other hand the thermal diffusivity decreased for samples dyed at T > 70 degreesC. This behaviour can be attributed to microstructure changes in the polymer chains, as shown by the change in the amorphous/crystalline ratio, observed in the x-ray diffraction data.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 35 , Times Cited: 5
Área	FISMAT
Afiliação	Universidade Estadual de Maringa, Departamento de Física Universidade Estadual de Maringa, Departamento de Química Universidade Estadual Campinas, Instituto de Física Gleb Wataghin

art. 189

Tipo da Referência	Journal Article
Autor	Olenka, L. Silva, E. N. da Santos, W. L. F. dos Rubira, A. F. Muniz, E. C. Medina, A. N. Cardoso, L. P. Baesso, M. L. Miranda, L. C. M. Bento, A. C.
Título	Crystallinity changes evidence in modified and dyed Poly(ethylene terephthalate) films monitored by photothermal method
Revista	Analytical Sciences
Ano	2001
Volume	17
Número	Sp. Iss
Páginas	S387-S389
Palavras-Chave	Photothermal method, Poly(ethylene terephtalate), Thermal properties , Cristallinity changes, Surface
Resumo	The thermal properties of some modified poly (ethylene terephthalate)-PET films were measured for a set of samples by changing preparation conditions such as temperature and time of surface modification (first step), and also time and temperature of dyeing (second step). Samples were modified with N,N-dimethylacrylamide for incorporating the dye Blue Samaron HGS. From the results of thermal diffusivity and specific heat we were able to point that the PET film improved their heat conduction after dyed at temperature below 70 degreesC (glass transition) for a time of dyeing of 30 min. While for the set dyed above T-g the thermal diffusivity decreases drastically for a 6 hour swelling time. This behavior indicates microstructural variation followed by cristallinity changes in the polyester chains, sensed by the thermal diffusivity. This crystallinity changes evidence was confirmed from x-ray analysis.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 10 , Times Cited: 1
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual de Maringa, Departamento de Física Universidade Estadual de Maringa, Departamento de Química Universidade Estadual Campinas, Instituto de Física GW

art. 190

Tipo da Referência	Journal Article
Autor	Pereira, J. D. Silva, E. C. da Mansanares, A. M. Miranda, L. C. M.
Título	Simultaneous determination of the thermal properties for liquid and pasty materials from photopyroeletric measurements
Revista	Analytical Sciences
Ano	2001
Volume	17
Número	Sp. Iss
Páginas	S172-S174
Palavras-Chave	Phase-transitions, Parameters, Thermal properties, Liquids
Resumo	In this work we are proposing a new experimental configuration based in the use of two sensors to allow the simultaneous measurement of both thermal diffusivity and effusivity of the sample. This Dual Sensor Photopyroeletric - DSPPE configuration implies in a single experiment and any calibration is required. Temperature dependent experiments are allowed from a cell equipped with Peltier elements. Substituting the upper sensor for a quartz window spectroscopic experiments are permitted. Water and margarine with different fat content were used as testing samples.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:10 , Times Cited:1
Área	FISMAT
Afiliação	Universidade Estadual de Campinas, Instituto de Física Universidade Estadual de Maringa, Departamento de Física

art. 191

Tipo da Referência	Journal Article
Autor	Rohling, J. H. Caldeira, A. M. F. Pereira, J. R. D. Medina, A. N. Bento, A. C. Baesso, M. L. Miranda, L. C. M. Rubira, A. F.
Título	Thermal lens scanning of the glass transition in polymers
Revista	Journal of Applied Physics
Mês	Feb.
Ano	2001
Volume	89
Número	4
Páginas	2220-2226
Palavras-Chave	Soda lime glass, Photoacoustic measurement, Diffusivity, Spectrometry, Foils, Absorption, Samples, Solids, Water, Model, Polymers
Resumo	In this article we discuss the use of the thermal lens technique for investigating the thermal properties of polymers as a function of temperature. It is also discussed how the experimentally determined thermal lens parameters can be used to locate the glass transition in polymers. The methodology is tested using a solution casted films of poly(vinyl chloride) as a testing sample. A comparison with conventional differential scanning calorimetry data is made. It is proposed that the current transient thermal lens methodology, with minor changes in its experimental configuration, could be adapted to develop a new methodology called differential thermal lens scanning especially designed for the investigation of the phase transitions in polymers. It is shown that this new methodology could be equally used for the measurement of the thermal expansion coefficient, above and below the glass transition.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited reference: 40, Times Cited: 12
Área	FISMAT
Afiliação	Universidade Estadual Maringa, Departamento de Física Universidade Estadual Maringa, Departamento Quimica

art. 192

Tipo da Referência	Journal Article
Autor	Rohling, J. H. Medina, A. N. Bento, A. C. Pereira, J. R. D. Rubira, A F Baesso, M L Miranda, L. C. M.
Título	Differential thermal lens temperature scanning approach to glass transition analysis in polymers: application to polycarbonate
Revista	Journal of Physics D: Applied Physics
Mês	Feb.
Ano	2001
Volume	34
Número	3
Páginas	407-412
Palavras-Chave	Resolved photoacoustic spectroscopy, Soda lime glass, Glasses,Thermooptical properties, Spectrometry, Diffusivity, Absorption, Solids, Water, Foils, Polymers
Resumo	In this paper, mode mismatched thermal lens spectrometry is applied to determine the thermal and optical properties of polycarbonate as a function of temperature. The focus of the experiments was in the temperature range between 120 °C and 170 °C, where the sample glass transitions occurs. In order to validate and evaluate the sensitivity of the proposed method we have also carried out conventional differential scanning calorimetry measurements. The results showed that the temperature dependence of the signal amplitude of the thermal lens provided a better definition in locating the glass transition compared to the differential scanning calorimetry data. In addition, a sharp decrease in the thermal diffusivity values at the beginning of the sample glass transition was observed. According to the Debye model, this change was attributed to the variation of the sample elastic constant throughout the glass transition. Finally, we propose this procedure, called the differential thermal lens temperature scanning approach, as a new method for the investigation of phase transitions in transparent polymers.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:42 , Times Cited:8
Área	FISMAT
Afiliação	Departamento de Física, Universidade Estadual de Maringá Departamento de Química, Universidade Estadual de Maringá

art. 193

Tipo da Referência	Journal Article
Autor	Rohling, J. H. Medina, A. N. Pereira, J. R. D. Rubira, A. F. Bento, A. C. Miranda, L. C. M. Baesso, M. L.
Título	Thermal lens versus DSC measurements for glass transition analysis of polymer
Revista	Analytical Sciences
Ano	2001
Volume	17
Número	Sp. Iss
Páginas	S103-S105
Palavras-Chave	Soda lime glass, Thermooptical properties, Spectrometry, Dependence, Samples, Film, Polymers
Resumo	In this work thermal lens spectrometry is applied to investigate the thermo-optical properties of polymers as a function of the temperature. The method is applied in poly(vinyl chloride) as a testing sample. It is proposed that thermal lens spectrometry with minor change in its experimental configuration, could be adapted to develop a new tool, called differential thermal lens scanning, especially designed for the investigation of phase transition in polymers.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 21, Times Cited:3
Área	FISMAT
Afiliação	Universidade Estadual de Maringa, Departamento de Física Universidade Estadual de Maringa, Departamento de Química

art. 194

Tipo da Referência	Journal Article
Autor	Lima, C. A. S. Miranda, L. C. M.
Título	On a simple model for the rate of surface coverage due to gas adsorption onto active porous samples exposed to rapidly varying gas phase concentration
Revista	Revista Mexicana de Fisica
Mês	Dec.
Ano	2002
Volume	48
Número	Suppl
Páginas	46-48
Palavras-Chave	Bleached wood pulp, Adsorption
Resumo	We present and discuss a model that describes the rate of adsorption coverage in active porous samples under continuous variation of the gas phase concentration. It is basically a Langmuir adsorption model, modified to account for the nanostructured porous nature of the sample surface and the possible presence of dissociative molecular adsorption phenomena. A non-linear differential rate equation is obtained and when solved numerically exhibits steady state oscillations
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:11, Times Cited:0
Área	FISMAT
Afiliação	Concepcion Univ, Dept Fis, Lab Processamiento Termo Opt Mat Universidade Estadual Maringa, Departamento de Física

art. 195

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Silva, M. G. da Massunaga, M. S. O. Marín, E. Vargas, H. Miranda, L. C. M.
Título	Monitoring of hydrocarbon vapor diffusion in air using a thermal wave interferometer
Revista	Journal of Applied Physics
Mês	May
Ano	2002
Volume	91
Número	9
Páginas	5581-5586
Palavras-Chave	resonator cavity, sensor
Resumo	A discussion on the use of thermal wave interference (TWI) for the monitoring of the transients of hydrocarbon in air is presented. The thermal wave signal was modeled using the logarithm-mixing model for the thermal diffusivity of a two-phase gas system in which the hydrocarbon vapor concentration in the air-filled TWI cell is a varying function of time. The time varying hydrocarbon vapor concentration was described assuming the simple Fick's model for mass diffusion of the hydrocarbon vapor in the stagnant air column of the TWI cell. The transient TWI signal amplitude data fitting yielded two parameters, namely, the saturation concentration and the characteristic diffusion time. From the corresponding values of the diffusion time the hydrocarbon mass diffusivities were straightforwardly obtained. The obtained values for the hydrocarbon mass diffusivities were found to be in good agreement with the ones reported in the literature.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 18, Times Cited: 1
Área	FISMAT
Afiliação	Universidade Estadual Norte Fluminense, Centro de Ciencia & Tecnologia Universidade Estadual Maringa, Departamento Fisica

art. 196

Tipo da Referência	Journal Article
Autor	Rohling, J. H. Mura, J. Pereira, J. R. D. Palangana, A. J. Medina, A. N. Bento, A. C. Baesso, M. L. Miranda, L. C. M.
Título	Thermal Lens Temperature Scanning for Quantitative Measurements in Complex Fluids
Revista	Brazilian Journal of Physics
Mês	June
Ano	2002
Volume	32
Número	2b Sp. Iss.
Páginas	575-583
Palavras-Chave	Fluorescence quantum efficiency, Isotropic phase-transition, Lyotropic phases, Liquid crystals, Soda lime glass, Thermooptical properties, Fluoride glasses, Refractive-index, Nemetic phase, Spectrometry, Dependence
Resumo	In this work thermal lens spectrometry is applied to investigate the thermo-optical properties of complex fluids as a function of the temperature. The method is applied in poly(vinyl chloride), in polycarbonate and in lyotropic liquid crystals as the testing samples. The focus of the discussion will be in the temperature range where the phase transitions occur. The perspective of future studies in this area will be discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	<E>WEBSCI: Cited Reference: 42, times Cited:3
Área	FISMAT
Grupo	LAS DIR
Afiliação	Departamento de Física, Universidade Estadual de Maringá Instituto Nacional de Pesquisas Espaciais

art. 197

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Silva, M. G. da Masssunaga, M. S. O. Cardoso, S. L. Vargas, H. Marín, E. Miranda, L. C. M.
Título	Monitoring of gas diffusion in air using the TWI technique: Thermal diffusivity measurements made easy
Revista	Review of Scientific Instruments
Mês	Jan.
Ano	2003
Volume	74
Número	1
Páginas	842-844
Palavras-Chave	Wave resonator cavity, Sensor, Vapor, Thermal properties, Transport properties, Liquids, Gas
Resumo	The thermal wave interference technique (TWI) has been explored in recent years for the investigation of the thermal and transport properties of gases and liquids. In this article we address ourselves to the quantitative understanding of the transient thermal wave interference signal of air:hydrocarbon vapor mixtures. This is the situation one faces when placing a given portion of liquid hydrocarbon inside an initially air-filled thermal wave interference. What is observed in this case is the thermal wave interference signal decay as a function of the time as a result of the change of the gas thermal diffusivity with time due to the increase of the hydrocarbon vapor concentration in air. In this article we show that value of the thermal diffusivity of the saturated mixture is readily obtained from the saturation value of the normalized signal amplitude, without the need of performing the conventional L scan.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:7 , Times Cited:0
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual do Norte Fluminense, Centro de Ciência e Tecnologia Facultad de Física, Universidad de La Habana, Cuba Instituto Nacional de Pesquisas Espaciais

art. 198

Tipo da Referência	Journal Article
Autor	Lima, J. A. P. Silva, M. G. da Sthel, M. S. Cardoso, S. L. Vargas, H. Marín, E. Miranda, L. C. M.
Título	Measurement of mass diffusivity in air using thermal wave interference detection
Revista	Review of Scientific Instruments
Mês	Jan.
Ano	2003
Volume	74
Número	1 Part 2
Páginas	433-436
Palavras-Chave	resonator cavity, sensor,vapor
Resumo	A discussion on the use of the thermal wave interference (TWI) for the monitoring of the transient of hydrocarbon in air is presented. The thermal wave signal was modeled using the logarithm-mixing model for the thermal diffusivity of a two-phase gas system in which the hydrocarbon vapor concentration in the air-filled TWI cell is a varying function of time. The time varying hydrocarbon vapor concentration was described assuming the simple Fick's model for mass diffusion of the hydrocarbon vapor in the stagnant air column of the TWI cell. The transient TWI signal amplitude data fitting yielded two parameters, namely, the saturation concentration and the characteristic diffusion time. From the corresponding values of the diffusion time the hydrocarbon mass diffusivities were straightforwardly obtained.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:18 , Times Cited:0
Área	FISMAT
Grupo	LAS
Afiliação	Universidade Estadual do Norte Fluminense, Centro de Ciência e Tecnologia Facultad de Física, Universidad de La Habana Instituto Nacional de Pesquisas Espaciais

art. 199

Tipo da Referência	Journal Article
Autor	Rohling, J. H. Pereira, J. R. D. Medina, A. N. Bento, A. C. Baesso, M. L. Sampaio, J. A. Lima, S. M. Catunda, T. Miranda, L. C. M.
Título	Thermal lens temperature scanning for quantitative measurements in transparent materials (invited)
Revista	Review of Scientific Instruments
Mês	Jan.
Ano	2003
Volume	74
Número	1
Páginas	291-296
Palavras-Chave	Calcium aluminate glasses, Fluorescence quantum efficiency, Soda lime glass, Thermooptical properties, Transition analysis, Aluminate glasses, Spectrometry, Depencence, Polymers, Solids, Polymers
Resumo	In this work the ability of thermal lens spectrometry for different temperature studies in transparent materials is discussed. The method was applied in polymers and optical glasses to measure the thermo-optical properties as a function of the temperature. The focus of the discussion will be on the temperature range where the glass transition occurs. The perspectives of future studies in this area will be discussed.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference: 29, Times Cited:0
Área	FISMAT
Grupo	LAS
Afiliação	Departamento de Física, Universidade Estadual de Maringá Instituto de Física de São Carlos, Grupo de Espectroscopia de Sólidos, Universidade de São Paulo Instituto Nacional de Pesquisas Espaciais

art. 200

Tipo da Referência	Journal Article
Autor	Vargas, H. Miranda, L. C. M.
Título	Photothermal techniques applied to thermophysical properties measurements (plenary)
Revista	Review of Scientific Instruments
Mês	Jan.
Ano	2003
Volume	74
Número	1
Páginas	794-799
Palavras-Chave	Thermal-wave resonator, Photoacoustic measurement, Cavity sensor, Diffusivity, Solids, Spectroscopy, Interferometer, Liquids, glasses, Mixtures, Transport properties
Resumo	In this article, we present a bird's eye view of applications of photothermal techniques for evaluation of the thermal properties of different materials. This is followed by the presentation of specific techniques for direct measurements of thermal diffusivity and thermal effusivity and indirect measurements of heat capacity. The presentation finishes by discussing the use of alternative photothermal techniques for the investigation of thermal and transport properties of gases and liquids.
Idioma	English
Detentor da Cópia	SID/SCD
Tertiary Type	E WEBSCI: Cited Reference:60 , Times Cited:0
Área	FISMAT
Grupo	LAS
Afiliação	Centro de Ciência e Tecnologia, Laboratório de Ciências Físicas, Universidade Estadual do Norte Fluminense Instituto Nacional de Pesquisas Espaciais