STRESS DEPENDENCE OF MAGNETOSTRICTION IN AMORPHOUS FERROMAGNETS - ITS VARIATION WITH TEMPERATURE AND INDUCED ANISOTROPY

In this work we report magnetostriction measurements obtained in a Co-rich amorphous alloy in which macroscopic anisotropies of different easy axis directions and strengths were induced. Particular interest was focused on the determination of the thermal evolution of the stress dependence of the magnetostriction as well as the influence of the anisotropy on such evolution. Although the results are within the experimental accuracy limit some conclusions have been drawn. In particular, the influence of the easy magnetization direction on the thermal variation of the stress dependence at low temperature seems clear from the results we show here. Also we report for the first time the appearance of a decrease in the absolute value of the stress derivative of the magnetostriction after thermal treatment.