Phenomenological model for magnetoimpedance in soft ferromagnets

The dependence of magnetoimpedance (MI) on transverse susceptibility in sof t ferromagnets is used in conjunction with an existing phenomenological dom ain structure model to study the relative importance of moment rotation and domain-wall motion in MI. It is shown that moment rotation is predominantl y responsible for the observed behavior in amorphous wires at frequencies a bove 1 MHz. It is also necessary to include anisotropy distributions in bot h magnitude and direction. (C) 1998 American Institute of Physics.