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Itens para a visualização no momento 41-50 of 52
Produção de filmes supercondutores de nióbio e de sistemas híbridos crescidos por Magnetron Sputtering DC
(Universidade Federal de Santa Maria, 2012-08-16)
Currently, several research groups have been devoted to the production of superconducting
films. This interest lies on the facility of their manipulation, on the understanding of basic
concepts of the superconductivity ...
Estudo do exchange bias em filmes finos de NiFe/FeMn (bicamadas) e NiFe/IrMn (multicamadas)
(Universidade Federal de Santa Maria, 2016-03-23)
The Exchange Bias (EB) phenomenon consists of an interfacial exchange coupling between a ferromagnetic (FM) material and an antiferromagnetic (AFM) one and has as the main characteristics the rise of a unidirectional ...
Modelagem lógica de senescência celular humana
(Universidade Federal de Santa Maria, 2012-12-12)
After the progressive telomere shortening in successive cell divisions, normal
somatic cells undergo a growth arrest called cellular senescence that occurs due to
incomplete DNA replication. Senescence can also be activated ...
Multicamadas de NiFe/FeMn com potencial de aplicação como sensores a altas frequências
(Universidade Federal de Santa Maria, 2016-02-12)
In this work we investigated the magnetization process and the magnetoimpedance in samples exhibiting exchange bias. Ni81Fe19=Fe50Mn50=T a bilayers and multilayers where
grown onto glass substrates. The exchange bias was ...
Estudo de exchange bias via magnetorresistência anisotrópica
(Universidade Federal de Santa Maria, 2013-08-15)
Anisotropic magnetoresistance (AMR) corresponds to the change of R in an ferromagnetic
material with the angle between electric current and magnetization. Sensors using this
effect are suited to detect both angular and ...
Algoritmo genético acoplado a um método multi-grid e a teoria dos grafos para determinação da estrutura de equilíbrio de aglomerados atômicos
(Universidade Federal de Santa Maria, 2012-12-14)
In this work we present a proposal to improve Genetic Algorithm method by coupling
it to the techniques of discretization of the configurational space via the multi-grid
methodology, and by employing a topological selection ...
Congelamento inverso em um modelo de vidro de spin fermiônico
(Universidade Federal de Santa Maria, 2012-10-03)
The present work studies the counterintuitive phenomenon of inverse transitions (IT). The
IT are a class of phase transitions (reversible) in which the ordered phase appears at higher
temperatures than the disordered ...
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 ...
Sazonalidade da concentração de CO2 atmosférico em uma área agrícola no RS
(Universidade Federal de Santa Maria, 2012-01-31)
In this work an agricultural area in Cruz Alta/RS was used to evaluate the seasonality of CO2
concentration with respect to meteorological variables of temperature, global radiation and
rainfall. The study period was ...
Indução de um eixo fácil de magnetização utilizando máscaras de sombreamento em filmes finos de CoFeB
(Universidade Federal de Santa Maria, 2012-01-30)
CoFeB thin films were produced using the technique of magnetronsputtering. Six
samples were produced magnetic thin films with two different thicknesses, using
different settings for shading masks. For each film were made ...