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Itens para a visualização no momento 101-110 of 186
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 ...
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 ...
Eletrocerâmicas multifuncionais ecologicamente corretas baseadas em (Bi0,5Na0,5)TiO3: a influência da dopagem doadora sobre suas propriedades físicas
(Universidade Federal de São Carlos, 2018-08-30)
In the current context of research that points to the development of ecologically correct materials highlights the fact that a single family of materials can not be obtained capable of mimicking all the properties of PZTs ...
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 ...
Estudos sobre as equações de Bethe
(Universidade Federal de São Carlos, 2015-05-15)
In this dissertation we made an analytic study of the Bethe Ansatz equations for the XXZ six vertex model with periodic boundary conditions. We had show that the Bethe Ansatz equations deduced from the algebraic and ...
Propriedades óticas e de transporte em heteroestruturas semicondutoras contendo GaMnAs
(Universidade Federal de São Carlos, 2011-10-14)
In this work, we have investigated Ga1-xMnxAs/GaAs/AlAs quantum wells (QWs) with low Mn concentration (x < 0.1%) grown by Molecular Beam Epitaxy at substrate temperatures of 400 and 450°C. We have investigated the time-resolved ...
Problema relativístico de dois corpos.
(Universidade Federal de São Carlos, 2003-12-08)
We study the relativistic two-body problem of the action-at-a-distance electrodynamics.
This dynamical system appeared 100 years ago as a time-symmetric relativistic
motion and acquired the status of electrodynamics in the ...
Nanoarquitetura em sistemas de alumina anódica porosa e configurações magnéticas de partículas de Co eletrodepositadas.
(Universidade Federal de São Carlos, 2005-10-30)
This thesis presents results on tailoring porous anodic alumina films, the Co-CoO electrodeposition on alumina template and the magnetic behavior of such system. Mono and bi-modal pore distribution at the film surface were ...
Estudo de desordem substitucional no espectro de fônons via espalhamento Raman.
(Universidade Federal de São Carlos, 2004-05-03)