@Article{RighettiGCGRADSAL:2016:MaStPr,
author = "Righetti, V. A. N. and Gratens, X. and Chitta, V. A. and Godoy, M.
P. F. de and Rodrigues, A. D. and Abramof, Eduardo and Dias, J. F.
and Schikora, D. and As, D. J. and Lischka, K.",
affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Universidade de
S{\~a}o Paulo (USP)} and {Universidade de S{\~a}o Paulo (USP)}
and {Universidade Federal de S{\~a}o Carlos (UFSCar)} and
{Universidade Federal de S{\~a}o Carlos (UFSCar)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal
do Rio Grande do Sul (UFRGS)} and {Universitat Paderborn} and
{Universitat Paderborn} and {Universitat Paderborn}",
title = "Magnetic and structural properties of Fe-implanted cubic GaN",
journal = "Journal of Applied Physics",
year = "2016",
volume = "120",
number = "10",
pages = "103901",
month = "Sept.",
abstract = "In this article, we report on structural and magnetic properties
of cubic GaN epitaxial layers implanted with Fe ions and
subsequently subjected to thermal annealing. The epitaxial quality
of the layers was studied by X-ray diffraction rocking curves
(omega-scans) and Raman spectroscopy. The results show that the
implantation damages the crystal structure producing an expansion
of the lattice parameter in the implanted region. These damages
are partially removed by the thermal treatment. Room temperature
ferromagnetism is observed for the sample implanted with a dose of
1.2 x 10(16) cm(-2), while samples implanted with 2.4 x 10(16)
cm(-2) show a coexistence of ferromagnetism and paramagnetism due
to disperse Fe3+. Thermal annealing changes these magnetic
properties. For the low dose sample, the ferromagnetism is
converted into paramagnetism while for the high dose we observed
an enhancement of the ferromagnetic contribution characterized by
a super-paramagnetism behavior attributed to Fe-based particles.",
doi = "10.1063/1.4962275",
url = "http://dx.doi.org/10.1063/1.4962275",
issn = "0021-8979",
language = "en",
targetfile = "Righetti.pdf",
urlaccessdate = "27 abr. 2024"
}