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Matrizes de reflexão com simetria 𝒰𝑞 [osp(2|2𝑚)(2)]
(Universidade Federal de São Carlos, 2012-03-16)
In this thesis we present solutions of the graded boundary YANG-BAXTER equations for vertex models with 𝒰𝑞 [osp(2|2𝑚)(2)] symmethy.
Equação mestra microscópica para o modelo de Rabi
(Universidade Federal de São Carlos, 2013-02-27)
The Rabi model is the most complete one has to describe the interaction between radiation and matter. However, as it is difficult to obtain the exact solution to this model, many of recent atom-field studies have used the ...
Transparência eletromagneticamente induzida em diferentes sistemas físicos e seu análogo em osciladores acoplados
(Universidade Federal de São Carlos, 2013-08-01)
The simultaneously incidence of two light beams on one or more atoms causes destructive interference of these beams in atomic states causing cancellation of the absorption of one of the incident beams and this phenomenon ...
Influência do tamanho médio de grão nas propriedades ferroicas de compósitos magnetoelétricos particulados
(Universidade Federal de São Carlos, 2016-04-08)
In the case of composites materials, which presents the magnetoelectric coupling,
there are so many questions about the influence of the microstructure on the coupled
and uncoupled properties. Thereby, this work proposes ...
Síntese e caracterização de filmes do sistema Zn(1−x)CoxO obtidos por spray pirólise
(Universidade Federal de São Carlos, 2016-03-09)
We report a systematic study on the structural, morphological and optical properties of
Zn1−xCoxO thin films grown by spray pyrolysis. The employed nominal concentrations
were up to 15 Co %. The films were deposited on ...
Efeitos da polarização elétrica sobre as propriedades magnéticas, térmicas e magnetoelétricas em compósitos multiferroicos de 0,675Pb(Mg1/3Nb2/3)O3-0,325PbTiO3/CoFe2O4
(Universidade Federal de São Carlos, 2018-12-10)
In this doctoral thesis, the magnetization, specific heat and magnetoelectric response (ME) measurements were carried out under remaining electric polarization conditions in the PMN-PT / CFO particulate multiferroic ...
Transport phenomena in quasi-one-dimensional heterostructures
(Universidade Federal de São Carlos, 2014-02-21)
O crescimento e caracterização de sistemas de heteroestruturas semicondutoras quasi-unidimensionais têm atraído grande interesse devido à sua potencial de aplicação tecnológica, como foto-detectores, dispositivos ...
Efeitos de spin em diodos de tunelamento ressonante tipo-p
(Universidade Federal de São Carlos, 2012-03-27)
In this work, we have investigated the spin effects in p-i-p GaAs/AlAs resonant tunneling diodes under magnetic field parallel to the tunnel current. The spin-dependent tunneling of carriers was studied by analyzing the ...
Avalanches de fluxo em filmes finos supercondutores estruturados : suscetibilidade ac, morfologia e outros estudos
(Universidade Federal de São Carlos, 2013-04-12)
Avalanches are sudden dramatic phenomena that occur in nature. The technique of magneto-optical imaging (MOI) has allowed us to observe abrupt flux entrances in superconductors, the so-called ux avalanches, due to ...
Estudo sistemático das propriedades estruturais e magnéticas de amostras policristalinas do sistema PrxY1-xBa2Cu3O7-d
(Universidade Federal de São Carlos, 2008-08-10)
One of the most studied high TC superconductor is the YBa2Cu3O7 (Y-123) as well as the different substitutions on the Y site for different rare earth elements. Generally, this does not show important effects on the magnetic ...