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Abstracts
The double-peak behaviour of giant magneto-impedance (GMI) dependence on the external magnetic field strength H is observed in as-cast glass-covered amorphous thin wire Co_{70.5}Fe_{4.5}Si_{15}B_{10} (microwire), as well as in microwire with the removed glass cover. The position of sharp peaks is symmetrical (H=± H_{m}) with respect to zero external magnetic field strength (H=0) and corresponds to the critical field of irreversible magnetization rotation. The maximum GMI ratio (ΔZ/Z)_{max} dependence on the amplitude of current i_{ac} at frequency of 1 MHz is analysed by means of the helical anisotropy (0<α<90°), induced during preparation of the microwire and after glass-cover removing. The additional dc bias current i_{dc} ≤ i_{ac} is applied in order to achieve asymmetrical GMI effect. Asymmetrical GMI dependences exhibit hysteresis which can be explained by irreversible magnetization rotation at ferromagnetic surface of the microwire.
Discipline
Journal
Year
Volume
Issue
Pages
132-133
Physical description
Dates
published
2014-07
Contributors
author
- Department of Physics, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv126n1062kz