Effects of magnetic permeability and resistivity on magneto-impedance in Fe-Cu-Nb-Si-B alloy ribbons

被引：19

作者：

Ku, WJ ^{[1
]}

Ge, FD ^{[1
]}

Zhu, JN ^{[1
]}

机构：

[1] TSING HUA UNIV,DEPT MAT SCI & ENGN,BEIJING 100084,PEOPLES R CHINA

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 1997年 / 30卷 / 13期

关键词：

D O I：

10.1088/0022-3727/30/13/003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The giant magneto-impedance (MI) effect and magnetic permeability of Fe73.5Cu1Nb3Si13.5B9 alloy ribbons were measured as a function of the annealing temperature. When the ribbons had been annealed at the optimum temperature (T-a = 843 K) they exhibited both a large MI and excellent soft magnetic properties. The MI was also calculated on the basis of classical electromagnetic theory. It was found that a large change in the effective magnetic permeability, caused by the application of an external magnetic field in an excellent soft magnetic sample, was crucial for the MI effect. Furthermore, the effect of the resistivity on the MI was also investigated. When the resistivity decreases, the eddy current losses increase and the frequency at which the variation in the complex impedance exhibits its maximum moves to a low value; thus the sample exhibits a large MI effect.

引用

页码：1842 / 1845

页数：4