Magnetization reversal process at low applied magnetic field in a Co-rich amorphous wire

Abstract

The effect of the length sample and applied tensile stress on the hysteresis loop of a Co 72.5Si 12.5B 15 amorphous wire has been investigated at the amplitude of applied field just above the switching field. The character of the hysteresis loop changes with the length as well as with the applied stress. Measurements of the magnetic remanence were made by displaying the hysteresis loop of the center of the wire as well as the local hysteresis loop in different points along the wire. Experimental results can be satisfactorily explained by the generalization of the outer-shell model developed for a Co-rich amorphous wire of finite length exhibiting negative magnetostriction, where the outer-shell magnetization configuration is a consequence of a radial dependence of the residual tensile stress.