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Magnetic properties and domain structures in stress-annealed FeZrB-(Cu)-(Nb) nanocrystalline ribbons

Published online by Cambridge University Press:  15 September 2001

A. Benchabi ,
F. Alves ,
R. Barrué ,
J. C. Faugières  and
J. F. Rialland
A. Benchabi*
Affiliation:
Magnetic Materials team, LESiR/CNAM-ENS Cachan 61, avenue Pr. Wilson, 94235 Cachan Cedex, France
F. Alves
Affiliation:
Magnetic Materials team, LESiR/CNAM-ENS Cachan 61, avenue Pr. Wilson, 94235 Cachan Cedex, France
R. Barrué
Affiliation:
Magnetic Materials team, LESiR/CNAM-ENS Cachan 61, avenue Pr. Wilson, 94235 Cachan Cedex, France
J. C. Faugières
Affiliation:
Magnetic Materials team, LESiR/CNAM-ENS Cachan 61, avenue Pr. Wilson, 94235 Cachan Cedex, France
J. F. Rialland
Affiliation:
Magnetic Materials team, LESiR/CNAM-ENS Cachan 61, avenue Pr. Wilson, 94235 Cachan Cedex, France
*
benchabi@lesir.ens-cachan.fr
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Abstract

Magnetic properties of nanocrystalline FeZrB-(Cu)-(Nb) compared to FeSiBCuNb are reported. Observations of domain patterns by magneto-optical Kerr effect (MOKE) method presented herein highlight qualitatively the incidence of stress-annealing on the induced anisotropy in soft magnetic materials. Transverse fine domains found in FeSiBCuNb alloys are consistent to a magneto-elastic interpretation of the stress-induced anisotropy. Nevertheless, it is not the case for FeZrB-(Cu)-(Nb) family where we observe a pronounced longitudinal induced anisotropy. According to the so-called “back stress effect” advanced by Herzer, the negative $\lambda_{\rm s}$ of bcc α-Fe grains, as well of bcc α-FeSi grains, should yield transverse anisotropy. Nowadays, this surprising feature is not still clear. For a technical standpoint, stress-induced anisotropy is interesting for new magnetic components in power electronics.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 15 , Issue 3 , September 2001 , pp. 173 - 176
Copyright
© EDP Sciences, 2001

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