Stress dependence of the hysteresis loops of Co-rich amorphous wire

The structure of the domain wall separating the inner core and the outer shell of Co-rich amorphous wire is studied theoretically on the basis of a model distribution of the residual quenching stresses throughout the wire volume. For a long wire, both axial and circumferential hysteresis loops are obtained at different values of the applied stress. The applied tensile stress is shown to reduce the remanent wire magnetization, but has only little effect on the wire coercivity. On the other hand, the applied torsional stress leads to an increase of the wire coercivity. The results obtained are in qualitative agreement with recent experiments.