Cobalt Thin Films
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Structural, optical and electrical properties of Ni-doped Co3O4 prepared via Sol-Gel technique
In this article, Nickel doped Cobalt oxide thin films and powders have been prepared on glass substrates using sol gel based dip coating process in order to investigate their optical, structural and electrical properties. The Ni concentration was changed from 0 to 9 wt(%).The synthesized samples were characterised by Ultraviolete visible analysis, X-ray diff
Mat. Res.. Publicado em: 07/02/2018
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2. Optical and Electrical Properties of Chemical Bath Deposited Cobalt Sulphide Thin Films
Cobalt sulphide (CoS) thin films were synthesized using the Chemical Bath Deposition (CBD) technique. X-ray diffraction (XRD) analysis was used to study the structure and the crystallite size of CoS thin film. Scanning Electron Microscope (SEM) studies reveal the surface morphology of these films. The optical properties of the CoS thin films were determined
Mat. Res.. Publicado em: 24/11/2016
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3. Magnetostricção e Anisotropia Magnética de filmes de Cobalto em substratos de vidro e silício / Magnetostricção and magnetic anisotropy of cobalt films on glass substrates and silicon
Este trabalho tem como objetivo estudar a magnetostricção e a anisotropia magnética de filmes finos de cobalto usando a técnica de Ressonância Ferromagnética. As amostras investigadas foram produzidas pela técnica de magnetron sputtering, depositadas sobre substratos de vidro e silício, com espessuras variando na faixa de 10 a 20 nm. Os valores efeti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/09/2011
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4. Magnetostricção e Anisotropia Magnética de filmes de Cobalto em substratos de vidro e silício / Magnetostricção and magnetic anisotropy of cobalt films on glass substrates and silicon
Este trabalho tem como objetivo estudar a magnetostricção e a anisotropia magnética de filmes finos de cobalto usando a técnica de Ressonância Ferromagnética. As amostras investigadas foram produzidas pela técnica de magnetron sputtering, depositadas sobre substratos de vidro e silício, com espessuras variando na faixa de 10 a 20 nm. Os valores efeti
Publicado em: 2011
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5. Estudos da deposição de filmes de diamante CVD sobre carbeto de tungstênio, com interface controlada de boreto / Studies of the deposition of diamond CVD films on tungsten carbide, boride with interface control
The objective of this work was to obtain adherent diamond films on WC-Co substrate through the hot filament assisted CVD technique, using a boriding process to form an intermediate layer and avoid the diffusion of the cobalt to the substrate surface. The boriding process consists of a reactive thermo diffusion treatment, in which boron atoms are spread in th
Publicado em: 2009
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6. Sensor de NO2 utilizando-se filmes moleculares de macrociclos de porfirinas
The object of this work is the study, characterization and development of new sensors using the LB and LS of thin films deposition techiniques. Such sensors has been used for the gas sensing of NO2, althought, not discarting its use for detecting other gases or substances such as alchools or herbicides, etc. The materials used for assemble the sensors were t
Publicado em: 2009
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7. Caracterização magnética de filmes de cromo e cromocobalto preparados por eletrodeposição / MAGNETIC CARACTERIZATION OF CHROMIUM AND CHROMIUM-COBALT FILMS PREPARED BY ELECTRODEPOSITION METHOD
Magnetic properties of electrodeposited of chromium and chromium-cobalt thin films on cooper substrate were investigated. The samples were prepared without introduction of additives. This procedure following to samples with granular structure. Magnetization measurements as a function of applied magnetic field and temperature show that the magnetic behavior e
Publicado em: 2008
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8. Magnetic nanocomposite thin films prepared by sol-gel process
Cobalt ferrite composite thin films, CoFe2O4/SiO2, were prepared by sol-gel process, using tetraethylorthosilicate (TEOS) as a precursor for silica, and metallic nitrates as precursors for ferrite. The obtained dip-coated films thermally treated at 550, 750, and 950 ºC were transparent, homogeneous and adherent. Their magnetic properties were measured from
Brazilian Journal of Physics. Publicado em: 2006-09
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9. Preparation and characterization of electrodeposited iron + cobalt thin films from a chloride bath
Ligas Fe-Co foram depositadas e dissolvidas em solução contendo íons metálicos e em solução de NH4Cl. Resultados voltamétricos sugerem interação entre os componentes da liga, originando uma solução sólida. Perfis de ALSV apresentam diferenciação para o processo de dissolução dos metais individuais e das ligas, com comportamento semelhante ao
Journal of the Brazilian Chemical Society. Publicado em: 2006-02
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10. MagnetoresistÃncia em filmes e multicamadas magnÃticas
In this master dissertation, we have studied, at room temperature, magnetic and transport properties of metallic films and multilayer of different structures such as: single layer thin films, coupled trilayer, ferromagnetic/antiferromagnetic bilayer and spin valve. Phenomenological models, which take in account the most relevant magnetic free energy terms, w
Publicado em: 2005
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11. 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
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12. Supramolecular photochemistry and solar cells
Supramolecular photochemistry as well as solar cells are fascinating topics of current interest in Inorganic Photochemistry and very active research fields which have attracted wide attention in last two decades. A brief outline of the investigations in these fields carried out in our Laboratory of Inorganic Photochemistry and Energy Conversion is given here
Anais da Academia Brasileira de Ciências. Publicado em: 2000-03