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Caracterização elétrica e magnética de Fe granular embebido em matriz de ZnSe
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Física - PPGF, 2008-03-13)
Electric and magnetic properties of nanoscopic clusters of iron immersed in Zinc
Selenide were studied in this work. The system presents superparamagnetic behavior with a
weak thermally activate ferromagnetic interaction. ...
Propriedades de transporte de spins polarizados em heteroestruturas semicondutoras
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Física - PPGF, 2009-06-25)
In this work we used the technique of scattering matrix to calculate the transmissivity of polarized spins in a semiconductor symmetrical double-barrier heterostruture. The dynamics of carriers is described by effective ...
Engenharia de defeitos em semicondutores de gap largo
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Física - PPGFCâmpus São Carlos, 2015-12-14)
Defects play a fundamental issue on physical properties of wide bandgap semiconductors
(WBS) due to the possibility of application in high temperature. This work shows the features of the defects in di erent kind of WBS ...
Propriedades magneto-óticas e de magneto-transporte de um diodo de tunelamento ressonante contendo Si δ - doping no poço quântico
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Física - PPGF, 2011-03-11)
In this work, we have studied the transport and optical properties of GaAs = AlGaAs resonant tunneling diodes with Si delta-doping at the center of the quantum well. We have studied magneto-transport and polarized resolved ...
Montagem de um sistema de micro-PL em baixas temperaturas para o estudo de semicondutores bidimensionais
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Física - PPGFCâmpus São Carlos, 2020-02-28)
Transition metal dicalcogenides (TMDs) are materials that have been attracted great attention in recent years, both from the point of view of fundamental physics and for a new generation of optoelectronic and spintronic ...
Cálculo de la temperatura de Curie en sistemas ferromagnéticos medio-metálicos
(Universidad Michoacana de San Nicolás de Hidalgo, 2015-08)
In 1998, Kobayashi et al. found that the ferromagnetic half-metallic compound Sr2FeMoO6, which has double perovskite structure, shows a high Curie temperature (TC 415K) and a substantial giant magnetoresistance at low ...
Caracterização de materiais semicondutores magnéticos diluídos de composição TiO2 dopados com Co e Sb por espectroscopia de absorção de raios X
(Universidade Estadual Paulista (Unesp), 2022-02-10)
With the advance of spintronics, the search for new materials to create electronic devices was growing, and so it was necessary to produce a material that by itself, uses this technology. Diluted magnetic semiconductors ...
Propriedades ópticas e magneto-ópticas de monocamadas de dicalcogenetos de metais de transição
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Física - PPGFCâmpus São Carlos, 2022-06-07)
Bidimensional (2D) materials are systems of great interest both from the fundamental physical point of view and for possible applications in electronics, optoelectronics and spintronics. In this thesis, the optical properties ...