Magnetic anisotropy caused by oriented surface roughness of amorphous ribbons

Abstract

The in‐plane anisotropy of nonmagnetostrictive metallic glass ribbons is investigated. The anisotropy of circular discs is measured by the method of transverse susceptibility and the torque method. The experimental results are compared with the theoretical calculations which take into account the magnetostatic energy of the magnetic charge on the rough surfaces of the ribbon. Satisfactory agreement between the experimental and theoretical results is reached. This indicates that the oriented surface roughness is the principal reason for the in‐plane anisotropy of the metallic glass ribbons. This conclusion is supported by measurements on polished and subsequently artificially roughened specimens. Copyright © 1987 WILEY‐VCH Verlag GmbH & Co. KGaA