Effects of applied currents on domain structures and permeability in amorphous metal ribbons

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Abstract
The effects of applied currents were studied on amorphous ribbons of Co70.3 Fe4.7 Si15 B10 annealed to produce different values of transverse or longitudinal anisotropy. In transverse-anisotropy ribbons, current-induced domain-wall motion was studied by SEM and used to determine domain-wall surface energy and exchange constant for various values of anisotropy. In longitudinal-anisotropy ribbons, current-induced magnetization rotation was demonstrated by SEM. This magnetization rotation also produced an increased initial permeability, and the current to produce maximum initial permeability was found to be proportional to the anisotropy constant.