Magneto-impedance and ΔE measurements of iron- and cobalt-based amorphous wires

Author

Atkinson, D. ; Beach, R.S. ; Squire, P.T. ; Platt, C.L. ; Hogsdon, S.N.

Author_Institution

Sch. of Phys., Bath Univ., UK

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3892

Lastpage

3894

Abstract

Magneto-impedance and ΔE measurements of amorphous wires having the compositions Fe_77.5Si₁₀B₁₅ and Co_72.5Si_12.5B₁₅ in the as-quenched and annealed states are presented. The results are interpreted in the light of the widely accepted core-shell domain models for positively and negatively magnetostrictive amorphous wires respectively. It is concluded that in wires of Fe_7.5Si₁₀B₁₅ the radial easy axis structure in the shell of the as-quenched wire weakens after light annealing, eventually giving way to a circumferential structure when surface crystallization occurs. In wires of Co_72.5Si_12.5B₁₅ significant circumferential anisotropy is inferred in all states of annealing studied

Keywords

Young´s modulus; amorphous magnetic materials; annealing; boron alloys; cobalt alloys; ferromagnetic materials; iron alloys; magnetic anisotropy; magnetic domains; magnetoelastic effects; magnetostriction; silicon alloys; ΔE measurements; Co-based amorphous wires; Co_72.5Si_12.5B₁₅; Fe-based amorphous wires; Fe_77.5Si₁₀B₁₅; Young´s modulus field dependence; annealed state; as-quenched state; as-quenched wire; circumferential anisotropy; circumferential structure; core-shell domain models; light annealing; magneto-impedance; negatively magnetostrictive amorphous wires; positively magnetostrictive amorphous wire; radial easy axis structure; surface crystallization; Amorphous magnetic materials; Amorphous materials; Annealing; Iron; Magnetic anisotropy; Magnetic cores; Magnetic domains; Magnetostriction; Perpendicular magnetic anisotropy; Wires;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489807

Filename

489807