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Mostrando ítems 61-69 de 69
Eletrocerâmicas de BNBK dopadas com tântalo: processamento, fenomenologia e propriedades de armazenamento de energia
(Universidade Federal de São Carlos, 2019-03-29)
Global energy demand for high energy storage capability materials associated with the search for lead-free electroceramic materials with suitable properties for applications has become the major topic in functional materials ...
Processamento e caracterização de compósitos laminados de La0.7Ba0.3MnO3/BaTiO3
(Universidade Federal de São Carlos, 2015-02-13)
Multiferroic laminated ceramic composites consisting of piezoelectric (BaTiO3, phase B) and magnetostrictive (Lao.7Bao.3MnO3, phase L) materials were synthesized by the Pechini and solid state reaction (SSR) method. Barium ...
Desenvolvimento de um algoritmo numérico na técnica do operador diferencial : aplicações em modelos de spins
(Universidade Federal de São Carlos, 2012-10-11)
In this work, we present the results obtained for Ising models and Heisenberg spin 1/2, where
two and three-dimensional, with disorder or frustration. We apply effective field theory
associated with the Operator Differential ...
Dinâmica dissipativa em sistemas quânticos fortemente interagentes
(Universidade Federal de São Carlos, 2019-12-06)
In this thesis we investigate the dissipative dynamics in strongly interacting quantum
systems. The dissipative dynamics that we investigate has relevance in the generation
of non-classic states of light, such as the ...
Síntese e caraterização de MgxPb(1-x)TiO3
(Universidade Federal de São Carlos, 2015-08-14)
We report the investigation of structural, optical and electrical properties of the MgxPb(1-
x)TiO3 ceramic system produced by mechanosynthesis. The solid state reaction
manufacturing method has been proved to be an ...
Domínios ferroelétricos em cerâmicas e materiais nanoestruturados: investigação por microscopia de piezoresposta
(Universidade Federal de São Carlos, 2011-12-07)
In this work, ferroelectric domain structure was investigated by Piezoresponse Force Microscopy (PFM). To this, an Atomic Force Microscope (AFM) has been modified to use it as PFM at room temperature and at high temperatures. ...
Análise de transformações de fases nas ligas Ti-35Nb-7Zr e Ti-xNb-3Fe por espectroscopia mecânica
(Universidade Federal de São Carlos, 2013-11-14)
In recent decades the study of β-Titanium alloys are attracting the interest to the biomaterials science community in general, since have improved properties as compared with current commercial biomedical alloys which ...
Redes de osciladores dissipativos: o modelo duplicado de Caldeira-Leggett, transferência quase-perfeita de estados e recoerência
(Universidade Federal de São Carlos, 2010-02-25)
In this work we treat firstly what we call the double Caldeira-Leggett model, which consists on the approach to the dynamics of two dissipative harmonic oscillators via Feynman-Vernon theory. We derived and solved the ...
Development of seminconductor nanowire materials for electronic and photonics applications
(Universidade Federal de São Carlos, 2019-12-05)
The thesis is concerned with study of GaAs nanowires fabricated on Si substrate.
The possibility of growing III-V semiconductor materials directly on silicon in the
form of nanowires is an attractive route to the integration ...