Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/80185
Type: Artigo de periódico
Title: Influence of induced anisotropy and magnetostriction on the giant magnetoimpedance effect and its aftereffect in soft magnetic amorphous ribbons
Author: Pirota, KR
Sartorelli, ML
Knobel, M
Gutierrez, J
Barandiaran, JM
Abstract: Systematic measurements of giant magnetoimpedance (GMI) and its relaxation (magnetoimpedance aftereffect, MIAE) have been carried out on a series of Go-rich amorphous ribbons with different magnetostriction constant, before and after the induction of transverse anisotropy through stress-annealing. Interesting characteristics of the GMI effect as a function of driving current (circular field) amplitude and frequency were observed. The applied thermal treatment produced a shift in the magnetostriction values, as well as a strong magnetic anisotropy perpendicular to the ribbons axis. The behaviour of GMI changes drastically upon stress-annealing, all samples displaying a hysteretic behaviour and a well-defined peak structure. However, the magnitude of the effect is not substantially affected by the thermal treatment. On the other hand, a strong suppression of the impedance relaxation (aftereffect) is verified after the annealing procedure. Besides the obvious technical implications, the experimental data are used to discuss the possible physical origin of the magnetoimpedance aftereffect. (C) 1999 Elsevier Science B.V. All rights reserved.
Subject: giant magnetoimpedance
amorphous ribbons
aftereffect
induced anisotropy
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0304-8853(99)00371-6
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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