CALCULATION OF MAGNETOCRYSTALLINE ANISOTROPY OF Nd₂Fe₁₄B

The contribution of Nd³⁺ ions to the magnetocrystalline anisotropy of intermetallic compound Nd₂Fe₁₄B was calculated by single ion theory. The results explained the high anisotropy of Nd-Fe-B alloy. By adjusting the shielding factors the calculated K₁-T and K₂-T relations agree with the experimental curves.