INFLUENCE OF THE THERMAL TREATMENTS AND MECHANICAL-STRESS ON THE MAGNETIC BISTABLE BEHAVIOR IN A CO-SI-B AMORPHOUS WIRE

Magnetic bistable behavior of Co72.5Si12.5B15 amorphous wire has been investigated. Such study has been performed from the dependence of the switching field, H, and reduced remanence, m(r), on applied tensile stress (sigma(a)) in wires submitted to single-current and stress-curr ent annealing. This dependence was obtained from the M(Z)-H-Z and M(Z) -H-phi hysteresis loops of the wire and they suggest a different mecha nism to that of nucleation process for explaining the bistable magneti c behavior of this wire.