Magneto Optical Kerr Effect
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Structure, morphology and magnetism of an ultra-thin [NiO/CoO]/PtCo bilayer with perpendicular exchange bias
Electronic and magnetic properties of nanoscale materials are closely related to the atomic arrangement at the interface shared by different chemical elements. A very precise knowledge of the surface/interface structure is then essential to properly interpret the new properties coming out. Of a particular interest is the relationship between structure, morph
Brazilian Journal of Physics. Publicado em: 2009-04
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2. Decoherence and relaxation time in an ensemble of quantum dots / Tempos de relaxação e decoerencia em ensembles de pontos quanticos
Experimental measurements were carried out to determine the scales of the relaxation and decoherence time for the electronic spin as quantum bit. The structure of the exciton states was investigated with the objective to serve as intermediate states in the spin manipulation. The system studied for the implementation of the quantum computation is an ensemble
Publicado em: 2007
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3. CRESCIMENTO, ESTRUTURA E POLARIZAÇÃO DE TROCA EM BICAMADAS FERROMAGNETO / ANTIFERROMAGNETO PREPARADAS POR DEPOSIÇÃO EM CONDIÇÕES DE EPITAXIA POR FEIXE MOLECULAR: Fe / EuTe(111), Fe / Ni50Mn50(001) e Ni1-xFex / Fe50Mn50
Magnetic interaction at interfaces between different layered magnetic materials is an important current topic in physics and materials science, particularly when combining ferromagnetic metals and semiconductors. The exchange bias effect associated with the exchange coupling between antiferromagnetic (AFM) and ferromagnetic (FM) systems, has been extensively
Publicado em: 2007
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4. Montagem e construção de um magnetômetro a efeito Kerr magneto-óptico
Nesta dissertação de mestrado foi montado um magnetômetro de efeito Kerr Magneto-Óptico para fazer caracterização de amostras tipo filme fino e ultrafino, amostras estas que serão crescidas após a implementação da técnica de Sputtering no laboratório de magnetismo deste departamento. Neste trabalho também foi construído um eletroímã arrefecid
Publicado em: 2006
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5. Desenvolvimento de um microscópio óptico e magnetoóptico de varredura em campo-próximo / Development of a Magneto-optical Scanning Near-field Optical Microscope (MO-SNOM)
To support nanosciences evolution, there is a strong demand for developing new instrumentation devoted to nano-scale characterization. In this context, the development of the Scanning Near-field Optical Microscope (SNOM) took place. In contrast to traditional optical microscopes, SNOM deals with evanescent electromagnetic radiation and, consequently, the res
Publicado em: 2005
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6. Filmes de MnAs sobre GaAs e nanoestruturas de MnAs implantadas em GaAs
We have studied the structural and magnetic phase transition of MnAs in films epitaxially grown by MBE on GaAs (001) and GaAs (001) implanted samples with Mn and subsequent annealing. In the two kinds of samples the structural transition was studied by x-ray diffraction as a function of temperature. The results presented a continuous and smooth decrease in t
Publicado em: 2004
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7. O magnetometro a Efeito Kerr e o filme fino de Co/Si
The aim of this work was to study and implement a technique for the characterization of the magnetic properties of thin films through a Kerr magnetometer (MEK). First we present the phenomenology behind the magneto-optic Kerr effect. In the sequence we present the magnetometer (MEK) and the experimental procedures applied to get hysteresis loops from the mag
Publicado em: 2002
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8. Efeito Kerr magneto-óptico espectral e sperimagnetismo de filmes amorfos de terra rara-Co / Spectral magneto-optical Kerr effect and magnetism-speri of the films of amorphous rare earth-Co
We have observed the spectral behavior of the transverse magnetooptical Kerr effect (TMOKE) in thin films of rare earth - cobalt amorphous alloys for the visible and the near-ultraviolet ranges of spectrurn (wavelength fiom 325 nm up to 670 nm). The relative change of reflectivity has shown a maximum at the blue wavelength. We have concluded that this magnet
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/05/2001