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Modelo do potencial ótico complexo para estudo de espalhamento de elétrons por moléculas e radicais livres
(Universidade Federal de São Carlos, 2008-04-11)
In this work, we seek a better understanding of the role of the absorption potential involved in the dynamics of electron-atom (-molecule) interactions, in arder to develop a po¬tential model that better represents the ...
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 ...
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 ...
Visualização, caracterização e manipulação de paredes de domínios em filmes finos ferroelétricos
(Universidade Federal de São Carlos, 2017-08-10)
In this work, conductivity in ferroelectric domain walls, in materials whose domains are insulating, was investigated at the nanoscale using a combination of techniques based on atomic force microscopy. Polycrystalline and ...
Multiferroicity and structural anomalies in Quadruple Perovskite Manganites: case study (A)Mn7O12, A = Na and La
(Universidade Federal de São Carlos, 2019-01-15)
In this work we study the quadruple perovskite structure manganese oxides NaMn7O12 and LaMn7O12 under the point of view of multiferroicity, magnetoelectric coupling, and also structure anomalies on NaMn7O12. These studies ...
Estudo das propriedades físicas do composto NixPb1-xTiO3: compósito versus solução sólida
(Universidade Federal de São Carlos, 2017-03-15)
In this work a physical properties study of the samples series NixPb1-xTiO3 will be presented using several experimental techniques, with emphasis on Raman spectroscopy and X-ray diffraction. For these samples, Raman ...
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 ...
Propriedades inter e intragranulares de amostras mesoscópicas de YBa2Cu3O7-δ ; preparadas por síntese química
(Universidade Federal de São Carlos, 2010-05-14)
This work consists of a systematic study of the evolution of the morphological characteristics and the superconducting properties of YBCO samples prepared using the Modified Polymeric Precursors Method (MPPM). Aiming at ...
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 ...
Electronic and optical properties of Quasi-2D nanostructures and exfoliated systems
(Universidade Federal de São Carlos, 2017-10-30)
This thesis is aiming to study, according to a theoretical approaches, the electronic and optical properties of quasi-2D semiconductor quantum systems. Using the k · p model as basis we obtained a satisfactory set of results ...