Anomaly in the Magnetic Properties of the YCo4B Compound

Abstract

Spin reorientation observed in the YCo4B compound at 145 K in which the magnetic moment rotates from the c-axis to the basal plane on decreasing temperature is reported. A preliminary crystal field calculation reveals that the negative anisotropy of 6i site in YCo4B is large and responsible for the basal plane anisotropy of the compound at low temperature. The competition between this negative contribution to anisotropy and the positive one from the Co ion on the 2c site may be the reason of the observed spin reorientation. [Russian Text Ignored].