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@Article{HenriquesNaUsPaRaAb:2017:PhGiMa,
               author = "Henriques, A. B. and Naupa, A. R. and Usachev, P. A. and Pavlov, 
                         V. V. and Rappl, Paulo Henrique de Oliveira and Abramof, Eduardo",
          affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Universidade de 
                         S{\~a}o Paulo (USP)} and {Ioffe Institute} and {Ioffe Institute} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Photoinduced giant magnetic polarons in EuTe",
              journal = "Physical Review B",
                 year = "2017",
               volume = "95",
               number = "4",
                pages = "045205",
             abstract = "Photoinduced magnetic polarons in EuTe, with a magnetic moment of 
                         several hundred Bohr magnetons, were investigated as a function of 
                         pump intensity and temperature by pump-probe Faraday rotation. The 
                         quantum efficiency for optical generation of magnetic polarons is 
                         found to be 0.09. The pump-intensity dependence of the 
                         photoinduced Faraday rotation shows a sublinear increase, from 
                         which we deduce that the population of photoexcited polarons is 
                         limited by a maximum value of 4.5x10(15) cm(-3). This is four 
                         orders of magnitude less than the concentration of polarons that 
                         would completely fill the crystal, which suggests that the 
                         photoexcited polarons are anchored by defects. In addition to the 
                         generation of polarons, at high pump densities the modulated pump 
                         light also causes a small alternating heating of the illuminated 
                         region. The temperature dependence of the polaron magnetic moment 
                         is well described by the Curie-Weiss law. Above 100 K, polarons 
                         are thermally quenched with an activation energy of 11 meV.",
                  doi = "10.1103/PhysRevB.95.045205",
                  url = "http://dx.doi.org/10.1103/PhysRevB.95.045205",
                 issn = "1098-0121",
             language = "en",
        urlaccessdate = "04 dez. 2020"
}


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