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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Magnetoimpedância em multicamadas de Ni81Fe19/Cu com a corrente de sonda perpendicular ao plano do filme / Magnetoimpedance in multilayers of Ni81Fe19/Cu with the chain of perpendicular sounding lead to the plan of film

Callegari, Gustavo Luiz 02 June 2006 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / In this work the behavior of the magnetoimpedance (MI) in ferromagnetic multilayered (Ni81Fe19/Cu) produced by magnetron sputtering was studied. In all measurements, the probe current was applied perpendicularly to the film surface. The MI measurements were performed in the frequency range 100kHz - 1.8GHz with an HP-4396B impedance analyzer and a specially designed sample holder. Magnetoimpedance ratios of 150% were obtained in some of the studied samples. / Neste trabalho foi estudado o comportamento da magnetoimpedância (MI) em amostras ferromagnéticas (Ni81Fe19) estruturadas em camadas intercaladas com metal normal (Cu) produzidas por magnetron sputtering com a corrente de sonda sendo aplicada perpendicularmente ao plano do filme. A faixa de freqüência usada neste trabalho foi de 100kHz a 1.8GHz num analisador de impedância modelo HP-4396B. Deste modo conseguiuse variações percentuais na MI da ordem de 150%.

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