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Estudo das propriedades estruturais através de espectroscopia Raman de amostras de grafite de poucas camadas (GPC) obtidas por clivagem mecânica
(Universidade Federal de São Carlos, 2011-08-25)
In this work, We report studies on samples of graphite few layers obtained from micromechanical techniques of cleaving Manual of highly oriented pyrolytic graphite (HOPG). In order to checking the number of layers in each ...
Propriedades magneto-óticas e de magneto-transporte de um diodo de tunelamento ressonante contendo Si δ - doping no poço quântico
(Universidade Federal de São Carlos, 2011-03-11)
In this work, we have studied the transport and optical properties of GaAs = AlGaAs resonant tunneling diodes with Si delta-doping at the center of the quantum well. We have studied magneto-transport and polarized resolved ...
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 ...
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. ...
Estudo experimental de efeitos de spin em heteroestruturas semicondutoras
(Universidade Federal de São Carlos, 2015-04-28)
In this thesis, we have investigated optical and spin properties of semiconductor
nanostructures. Photoluminescence and magneto-photoluminescence measurements
were performed in high magnetic field (B ≤ 15T), in GaBiAs ...
Síntese e caracterização de compósitos multiferroicos de manganita La: Sr e titanatos de Ba e Sr
(Universidade Federal de São Carlos, 2011-03-18)
In this paper, we seek to prepare composite multiferroics extrinsic whose potential for technological applications, especially in the electronics industry, and the possibility of new phenomena of fundamental scientific ...
Investigação das propriedades magnéticas de amostras de IrO2 e Co:IrO2 sintetizadas via método de Pechini
(Universidade Federal de São Carlos, 2010-08-31)
In this work the magnetic properties of iridium oxide synthesized via Pechini s method and doped with different concentrations of cobalt were studied. The proposal was to investigate the possibility of applying it as a ...
Multiferróicos monofásicos a base de Pb(Fe2/3W1/3)O3-PbTiO3: acoplamento magnetoelétrico intrínseco
(Universidade Federal de São Carlos, 2010-11-25)
Multiferroic ceramic solid solutions between the ferroelectric relaxor Pb(Fe2/3W1/3)O3 (PFW) and normal ferroelectric PbTiO3 (PT) [PFW-PT] has been synthesized by a modified B-site precursor method and characterized by ...
Dielectric and elastic response of perovskites: modelling and simulation
(Universidade Federal de São Carlos, 2013-09-09)
Nesta tese é estudada a resposta elástica e elétrica das perovskitas. As perovskitas são amplamente utilizadas em aplicações técnicas, sendo fundamental na eletrônica e no campo relativamente novo da nanoeletrônica. Elas ...
Propriedades de transporte em óxidos condutores transparentes (TCOs): In2O3, SnO2 e SnO2:F
(Universidade Federal de São Carlos, 2014-03-14)
In this work we studied some of the structural features and transport in nanostructured metal oxides synthesized by the vapor -solid mechanism (VS) aiming their application in high performance devices. The structural ...