Search
Now showing items 11-20 of 177
Propriedades físicas de modelos integráveis
(Universidade Federal de São Carlos, 2017-08-16)
In this thesis we tackled two di erent problems of quantum integrability. We derived nite sets of non-linear integral equations to describe physical properties of quantum chains invariant under the super-algebras su(2|1) ...
Obtenção e caracterização de heteroestruturas epitaxiais magnetoelétricas de [KNbO3]0,9-[BaNi1/2Nb1/2O3-𝛿]0,1 e [La0,7Sr0,3MnO3]
(Universidade Federal de São Carlos, 2016-10-07)
Magnetoelectric materials have been extensively studied in the last decade, particularly due to the applicability for sensors, attenuators, transformers and others. Hence as an objective for this work we propose a study ...
Processamento e propriedades do sistema ferroelétrico livre de chumbo (Bi, Na)TiO3 (Bi, K)TiO3 BaTiO3
(Universidade Federal de São Carlos, 2015-03-09)
In this work, the lead-free ceramic powders of xBi0,5Na0,5TiO3 - (0,7186 - 0,7143x) Bi0,5K0,5TiO3 - (2814 - 2857x) BaTiO with x = 0,8200; 0,8625; 0,8792, 0,9126 and 0,9300 (BNBK1000x) were prepared by the solid state ...
Caracterização óptica e magneto-óptica de filmes de GaPN
(Universidade Federal de São Carlos, 2016-09-13)
This project proposes a systematic study of III-V semiconductors, which are promising for integration with silicon. It consists of the characterization of GaPN film samples with different nitrogen concentrations. We ...
Estudo das propriedades ópticas de filmes finos e poços quânticos de GaAsPN/GaPN
(Universidade Federal de São Carlos, 2016-09-08)
Diluted nitride III-V semiconductor leagues have physical properties that make them
interesting for applications on optoelectronic devices. The possibility to lattice matching
GaAsPN with silicon makes this semiconductor ...
Estudo das propriedades estruturais e de transporte eletrônico em nanoestruturas de óxidos semicondutores e metálicos
(Universidade Federal de São Carlos, 2010-05-07)
The structural and transport features of oxide nanostructures synthesized by a vapour phase aproach: the VLS and VS methods were investigated in this work. ITO and In2O3 nanowires were characterized by using XRD, HRTEM and ...
Otimização das propriedades superficiais dos aços inoxidáveis AISI 304, AISI 316L e ASTM F138 recobertos com filme de alumínio e nitretados
(Universidade Federal de São Carlos, 2010-03-12)
Many industrial applications of stainless steel require the modification of surface properties, such as corrosion resistance, and mechanical properties such as hardness. For this purpose several surface modify techniques ...
Processamento e caracterização de cerâmicas transparentes do sistema ferroelétrico PMN-PT dopado com lantânio
(Universidade Federal de São Carlos, 2011-12-17)
In this work, one of the goals was the stabilization and/or optimization of the perovskita phase in the (Pb,La)(Mg1/3Nb2/3)O3+PbTiO3 (PLMN-PT) e Pb(Mg1/3Nb2/3)O3+PbTiO3+La2O3 (PMN-PT:La) powders in order to obtain ceramics ...
Estudo de efeitos quânticos nas propriedades eletrônicas de nanofios semicondutores
(Universidade Federal de São Carlos, 2010-03-02)
The growth and characterization of semiconductor nanowires systems have attracted increasing interest due to their potential technological application, like, photo-detectors, optoelectronic devices and their promising ...
Geração e proteção de estados comprimidos do campo e estados atômicos emaranhados em cavidades ópticas
(Universidade Federal de São Carlos, 2010-03-03)
In this work we investigated the engineering of interactions and reservoirs in the context of Cavity Quantum Electrodynamics. The investigated system consists of two identical three-level atoms trapped in two distinct ...