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Modos massivos e paredes de domínio em líquidos de Fermi
(Universidade Federal de São Carlos, 2018-06-11)
In this thesis, we use Fermi liquid theory to deal with three problems. The first and second problems are about a direct and an indirect detection of the amplitude massive ‘‘Higgs’’ mode in weak ferromagnets like ZrZand M ...
Estudos de vidros fluoroboratos e fluorogermanatos de chumbo, através de técnicas de espectroscopia óptica e de ressonância magnética
(Universidade Federal de São Carlos, 2018-12-04)
In this work two studies on rare earth−doped (Eu3+, Yb3+) lead fluorogermanate (GeO2−PbO−PbF2) and fluoroborate glasses (B2O3 −PbO −PbF2) were investigated. The main advantages of these glasses are their chemical stability ...
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 ...
Magneto hipertermia in vitro em células hek293t utilizando nanopartículas de óxido de ferro magnéticas com diferentes recobrimentos
(Universidade Federal de São Carlos, 2017-08-03)
One of the largest challenges on medicine has been developing treatments for several types of cancer. Moreover, conventional treatments for cancer such as chemotherapy and radiotherapy have been presenting undesirable ...
Contraste entre propriedades optoeletrônicas em estruturas de tunelamento ressonante n-i-n baseadas em GaAs
(Universidade Federal de São Carlos, 2019-05-15)
Resonant Tunneling Diodes (RTDs) are semiconductor devices usually composed of two barrier structures embedding a single quantum well (QW) and highly doped layers in its extremities. Under an applied bias voltage, the ...
Estudo das propriedades estruturais, elétricas e ópticas de filmes finos de Niobato de Sódio e Potássio (KNN), fabricados por deposição a laser pulsado (PLD)
(Universidade Federal de São Carlos, 2017-05-05)
Environmental problems arising from lead toxicity in materials, such as those in lead zirconate titanate (PZT) have stimulate the search for new lead-free ferroelectrics materials with ferroelectric and piezoelectric ...
Importância dos efeitos de absorção no espalhamento elástico de elétrons por moléculas
(Universidade Federal de São Carlos, 2017-03-11)
In this work we study the importance of absorption effects on the electron-molecule interaction dynamics. These effects are simulated by a complex optical model potential from which the imaginary part is an absorption ...
Efeitos da hibridização e do campo magnético externo na supercondutividade de modelos multibandas
(Universidade Federal de São Carlos, 2015-02-11)
Superconductivity one of the most intriguing physical phenomena has been extensively studied due to their potential for technological applications. Despite advances in research in physics there is still no complete theory ...
Aplicações da espectroscopia Raman ao estudo dos efeitos de temperatura e de pressão hidrostática em cristais orgânicos: 2-amino-1,3,4- tiadiazol, 2-amino-5-fenil-1,3,4-tiadiazol e 2-amino-5-(4-deciloxi-fenil)-1,3,4- tiadiazol
(Universidade Federal de São Carlos, 2015-03-27)
Molecular organic crystals are a promising class of materials because of their
excellent physical, chemical and biological properties. Among them, Thiadiazole and its
derivatives have been investigated in the last years ...
Estudo de propriedades estruturais, vibracionais, ópticas e magnéticas em amostras de Pb1-xCoxTiO3: transição de fase induzida por composição, temperatura e pressão
(Universidade Federal de São Carlos, 2019-03-29)
This work presents a study of the synthesis and characterization of structural, vibrational, optical and magnetic properties of the compound Pb1-xCoxTiO3 (PCoT). The PCoT samples were synthesized using the Solid State ...