Current annealing and magnetoimpedance in CoFeBSi amorphous ribbons

Author

Valenzuela, R. ; González, J. ; Amano, E.

Author_Institution

Nat. Univ. of Mexico, Mexico City, Mexico

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3925

Lastpage

3927

Abstract

CoFeBSi amorphous ribbons were current-annealed at 600 mA for times ranging from 9 sec to 5 min. Their complex impedance response was measured in the frequency range 5 Hz-13 MHz, under a DC field of zero and at 6.3 kA/m. Transverse permeability (and therefore magnetoimpedance) showed a maximum for an annealing time of ~1 min, while the propagating field (or unpinning field) for transverse domain walls, exhibited a minimum for the same annealing time. These results show the direct dependence of magnetoimpedance on transverse induced anisotropy, and are interpreted in terms of the dependence of the latter on two competing configurations

Keywords

amorphous magnetic materials; annealing; boron alloys; cobalt alloys; electric impedance; ferromagnetic materials; galvanomagnetic effects; induced anisotropy (magnetic); iron alloys; magnetic domain walls; magnetic permeability; silicon alloys; 5 Hz to 13 MHz; 600 mA; 9 sec to 5 min; CoFeBSi; amorphous ribbons; annealing time; complex impedance response; current annealing; magnetoimpedance; transverse domain walls; transverse induced anisotropy; transverse permeability; unpinning field; Amorphous magnetic materials; Amorphous materials; Annealing; Frequency measurement; Impedance measurement; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic field measurement; Perpendicular magnetic anisotropy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619617

Filename

619617