PIEZOMAGNETIC COEFFICIENTS OF AMORPHOUS-ALLOYS WITH LOW MAGNETOSTRICTION

The field dependences of the piezomagnetic coefficients for amorphous alloys of the system Co-Mo-Ni-Zr with low magnetostriction have been m easured by a dynamic stress technique. The alloys were heat-treated in a transverse magnetic field. All the field dependence curves of the p iezomagnetic coefficients are the curves show maxima. Three main types of curves were obtained: a rapid increase in low field and a sharp ma ximum; a rapid increase in low field and a wide maximum; and a slow in crease and a maximum in a field close to saturation. These differences are probably connected with different contributions of the stress mag netization: magnetization rotation and 90 degrees domain wall motion d ue to the heat treatment of the samples.