Asymmetric impedance in field-annealed Co-based amorphous wires and its bias field dependence

被引：8

作者：

Duque, JGS ^{[1
]}

De Araújo, AEP ^{[1
]}

Knobel, A ^{[1
]}

机构：

[1] Univ Estadual Campinas, UNICAMP, IFGW, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 299卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

asymmetric magnetoimpedance; Joule heating; bias field;

D O I：

10.1016/j.jmmm.2005.05.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Giant magnetoimpedance (GMI) was measured in Joule heated Co68.18Fe4.32Si12.5B15 amorphous wires. Samples heat treated in open air showed an asymmetric giant magnetoimpedance (AGMI) behaviour. The AGM I profile, measured at selected frequency values and bias circumferential fields, can be related to the exchange bias interaction between the soft magnetic amorphous material and a harder magnetic crystalline phase formed on the surface of the wire. The present data show that AGMI behaviour take place owing to a soft magnetic layer With unidirectional anisotropy that develops in the surface of the wire. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：419 / 424

页数：6

共 12 条

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