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Correlation between giant magnetoresistence and magnetic interactions in a Co/Ag multilayed/granular system

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Correlation between giant magnetoresistence and magnetic interactions in a Co/Ag multilayed/granular system

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Título Correlation between giant magnetoresistence and magnetic interactions in a Co/Ag multilayed/granular system
Autor Viegas, Alexandre da Cas
Geshev, Julian Penkov
Schelp, Luiz Fernando
Schmidt, Joao Edgar
Abstract Magnetizing, demagnetizing, and remanent magnetization curves for [Co (12 Å)/Ag(60 Å)]x15 multilayered/granular films thermally treated have been measured. The changes of the giant magnetoresistance and the interaction effects have been explained as a result of the structural, morphological, and magnetic evolution of the samples as a function of the thermal treatment. It has been inferred that for samples annealed at temperatures lower than 360 °C, the changes of the giant magnetoresistance come from the misalignment of the magnetic moments of the Co particles formed during annealing. A strong correlation between the giant magnetoresistance and the magnetic interaction effects has been found for samples annealed at temperatures higher than 360 °C: the giant magnetoresistance is degraded as the demagnetizing interparticle interactions are increased.
Contido em Journal of Applied Physics. Woodbury. Vol. 82, no. 5 (Sept. 1997), p. 2466-2471
Assunto Fisica da materia condensada
Magnetoresistencia : Magnetizacao : Filmes finos
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/95368
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