FORCED MAGNETOSTRICTION IN FEZR-BASED AMORPHOUS-ALLOYS

The magnetostriction constant and forced volume expansion have been me asured in amorphous melt-spun ribbons of composition Fe88Zr7B4Cu1, Fe8 7.2Zr7.4B4.3Cu1.1, Fe86Zr7B6Cu1, and Fe85Zr7B6Cu2. The values obtained show that the volume expansion plays the most important role at room temperature. The magnetic character of these samples was also estimate d from the Arrott plots at room temperature and from the thermal depen dence of the magnetization. As has been found, the volume contribution decreases with the Curie temperature, whereas the saturation magnetos triction contribution increases. The results measured are also related with the previously reported stress dependence of the Curie temperatu re. (C) 1998 American Institute of Physics. [S0003-6951(98)04043-1].