Title :
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
fDate :
11/1/1995 12:00:00 AM
Abstract :
Magneto-impedance and ΔE measurements of amorphous wires having the compositions Fe77.5Si10B15 and Co72.5Si12.5B15 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 Fe7.5Si10B15 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 Co72.5Si12.5B15 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; Co72.5Si12.5B15; Fe-based amorphous wires; Fe77.5Si10B15; 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;
Journal_Title :
Magnetics, IEEE Transactions on
