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Estudo de primeiros princípios de nanofios em arseneto de índio e fosfeto de índio
(Universidade Federal de Santa Maria, 2011-07-29)
In this work we used the density functional theory to study InAs and InP nanowires
and InAs/InP nanowire heterostructures. Initially we studied the structural, electronic
and mechanical properties of InAs and InP nanowires ...
Estudo teórico da interacção de oxigênio com nanotubos de BC2N
(Universidade Federal de Santa Maria, 2011-04-19)
Using first principles calculations based on the Density Functional Theory (DFT)
with spin polarization and norm conserving fully separable pseudopotentials, we have
studied the structural and electronic properties of the ...
Estudo da transição cristalográfica em filme fino de VO2 por difração de raios-x
(Universidade Federal de Santa Maria, 2011-03-28)
In one sample, X-Ray diffractions have been measured as a function of the temperature, in
order to follow the crystallographic transition experienced by VO2 near 68ºC. The results have
been analysed with the aide of a ...
Crescimento de filmes finos de ni81fe19 para aplicações envolvendo magnetorresistência anisotrópica
(Universidade Federal de Santa Maria, 2011-05-13)
Anisotropic magnetoresistance (AMR) consists in the change of the resistivity of a ferromagnetic metal as a function of the angle between the current and the magnetization, what makes AMR-based sensors promising to measure ...
Caminhos para a complexidade na camada limite atmosférica noturna
(Universidade Federal de Santa Maria, 2011-12-09)
The focus of the present thesis is the nocturnal atmospheric boundary layer, under very stable conditions.
In such situation, the turbulence production by the vertical wind shear may have similar magnitude to
the total ...
Não-estacionariedade de séries temporais turbulentas e a grande variabilidade dos fluxos nas baixas freqüências
(Universidade Federal de Santa Maria, 2011-08-11)
Turbulent flow high complexity makes it difficult to describe complex phenomena,
such as the transport of vector and scalar quantities at the lower atmosphere,
making the analysis of experimental data, such as time series, ...
Estudo do tunelamento em junções túnel de CoFeB=MgO=CoFeB
(Universidade Federal de Santa Maria, 2011-02-25)
Magnetic tunnel junctions (MTJ) ofCoFeB=MgO=CoFeB and multilayers of (CoFeB=MgO)x3 were produced using the technique of magnetron sputtering, where the insulating film was grown in an atmosphere reactive Ar +O. Multilayers ...
Variabilidade em escala associada com jatos de baixo nível e ondas de gravidade na camada limite noturna do Pantanal
(Universidade Federal de Santa Maria, 2011-08-22)
The Nocturnal Boundary Layer (NBL) turbulent structure above Pantanal Mato-Grossense, under
the influence of low-level jets (LLJ) and gravity waves (GW), is investigated. Experimental data
obtained during the Interdisciplinary ...
Parametrização do transporte de energia cinética turbulenta na camada limite convectiva
(Universidade Federal de Santa Maria, 2011-12-15)
In this work a parameterization for the transport terms of the turbulent kinetic energy
(TKE) budget equation, valid for a convective boundary layer (CBL) is presented. This is
a hard task to acomplish from experimental ...
Estudo teórico da interação de flúor em nanoestruturas de BC2N
(Universidade Federal de Santa Maria, 2011-09-09)
In this work we perform a theoretical study about fluorine adsorption in BC2N
nanostructures. The fluorine interaction with the BC2N nanostructures was studied
using only atomic fluorine on two nanotubos with different ...