Effect of magnetic annealing on magnetization changes of amorphous ribbon under stress

The effect of magnetic heat treatment on the stress-magnetization propertie s of Co-based amorphous ribbon with negative magentostriction constant was investigated. The sample changes the sign of its magnetostriction constant from negative to positive value due to the heat treatment under perpendicul ar and normal direction of magnetic field. The surface magnetic domain conf igurations were observed to reveal the mechanism of this magnetization chan ge. The abnormal magnetization change under tensile stress is deeply connec ted with the appearance of complicated domain configurations. (C) 2000 Else vier Science B.V. All rights reserved.