Experimental and phenomenological investigation of the effect of stress on magneto-impedance in amorphous alloys

Author

Atkinson, D. ; Squire, P.T.

Author_Institution

Sch. of Phys., Bath Univ., UK

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3364

Lastpage

3366

Abstract

The tensile stress dependence of magneto-impedance (MI) in CoSiB and CoFeSiB amorphous wires is reported. A phenomenological model for the transverse susceptibility based on a simple domain structure, and which includes the magneto-elastic energy contribution, is used. The square-root of the transverse susceptibility is assumed to be proportional to the magneto-impedance. The model predicts correctly the form of the stress dependence of the MI-effect, and shows that a significant distribution in the magnitude of the anisotropy constant is needed to explain the MI-response of these wires. Modelling also suggests that at higher excitation frequencies (⩾1 MHz) magnetic moment rotation is the dominant process controlling the MI-effect

Keywords

amorphous magnetic materials; boron alloys; cobalt alloys; iron alloys; magnetic anisotropy; magnetic domains; magnetic susceptibility; magnetoelastic effects; magnetoresistance; silicon alloys; CoFeSiB; CoSiB; amorphous wire; anisotropy constant; domain structure; magnetic moment rotation; magneto-impedance; magnetoelastic energy; phenomenological model; tensile stress; transverse susceptibility; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic domains; Magnetic susceptibility; Perpendicular magnetic anisotropy; Predictive models; Tensile stress; Wires;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617945

Filename

617945