Annealing Boron Copper Giant magnetoresistance Magnetic domains Magnetic permeability
Issue Date:
2004
Publisher:
Physica Status Solidi (A) Applied Research
Citation:
Volume 201, Issue 7, Page 1558-1562
Abstract:
We present here, the results of an investigation on giant magnetoimpedance (GMI) effect in both
annealed and as-quenched Co70Fe 5Si15B10 and Co70Fe 5Si15Nb2.2Cu0.8B7 ribbons. Substitution of Cu
and Nb for B in an initial Co70Fe 5Si15B10 composition forming the Co 70Fe5Si15Nb2.2Cu0.8B 7
composition improves both GMI effect and its field sensitivity. The GMI effect was more pronounced in the
annealed samples. The field sensitivity of both the longitudinal permeability ratio and the
magnetoimpedance ratio for the annealed Co70Fe5Si15Nb2.2Cu 0.8B7 ribbon increase exponentially as the
testing temperature is increased, indicating that the magnetic permeability is very sensitive to the
temperature. The results obtained are of significant importance in developing quick-response magnetic
sensors. ?? 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
