MAGNETOCRYSTALLINE ANISOTROPY OF DY2FE14B, HO2FE14B, GD2FE14B, MEASURED USING HIGH-FIELD TORQUE MAGNETOMETRY

Values are presented of uniaxial magnetocrystalline anisotropy constants, calculated from torque measurements for R//2Fe//1//4B, R equals Dy, Ho and Gd, from 4. 2 K to room temperature. The basal plane anisotropy calculated from torque measurements for Gd//2Fe//1//4B from 100 to 300 K is also reported. These anisotropy results are related qualitatively to the crystal structure and electronic structure of the rare earth ions.