Phenonemological model for magnetoimpedance in soft ferromagnets

Abstract

The dependence of magnetoimpedance (MI) on transverse susceptibility in soft ferromagnets is used in conjunction with an existing phenomenological domain structure model to study the relative importance of moment rotation and domain-wall motion in MI. It is shown that moment rotation is predominantly responsible for the observed behavior in amorphous wires at frequencies above 1 MHz. It is also necessary to include anisotropy distributions in both magnitude and direction.