Magnetocrystalline anisotropy of Pr2Fel4B

Abstract The saturation magnetization and magnetocrystalline anisotropy of Pr 2 Fe l4 B have been studied from magnetization curves of magnetically aligned powders. The saturation magnetization of Pr 2 Fe l4 B increases from 1.67 T at 280 K to 1.91 T at 4.2 K with decreasing temperature. The K 1 and K 2 of Pr 2 Fe l4 B decrease linearly with increasing temperature with the ratio of Δ K 1 =−5.83×10 4 J/m 3 K and Δ K 2 =−3.5×10 4 J/m 3 K, respectively. The K 1 and K 2 of Pr 2 Fe l4 B at 4.2 K are 22.0×10 6 and 11.0×10 6 J/m 3 , respectively, and those at 280 K are 6.1×10 6 and 1.0×10 6 J/m 3 , respectively.