UNUSUAL MAGNETIZATION ANISOTROPY IN AMORPHOUS ND-FE-AL RIBBONS

Nd60Fe30Al10 ribbons has been prepared by chill-block melt-spinning wi th different wheel speeds from 5 to 30 m/s. Fully amorphous ribbons we re obtained at wheel speeds of 25 and 30 m/s. These ribbons exhibited an unusually large anisotropy in magnetization. The effect of the magn etic anisotropy decreased with decreasing wheel speed, and nearly disa ppeared at the wheel speed of 5 m/s, at which the ribbon consisted of a mixture of a more stable Fe-rich amorphous phase and a crystalline N d phase with a strong crystallographic texture. (C) 1998 Elsevier Scie nce B.V. All rights reserved.