稀土合金RCo_5中稀土离子的磁晶各向异性

On the magnetocrystalline anisotropy of rare earth in RCo_(5)

利用单粒子点电荷模型研究了RCo5中一系列稀土离子 ,包括轻离子Pr3 + ,Nd3 + 和重离子Tb3 + ,Dy3 + ,Er3 + 的磁晶各向异性。计算分析表明过渡族元素对晶场的贡献和晶场高阶项不可忽略 ,虑及过渡族元素和晶场高阶项对晶场的贡献后 ,得到的各稀土离子的磁晶各向异性常数及其随温度变化都与实验一致的结果 ,此结果还特别解释了以前不能解释的轻稀土离子Pr3 +

The original of the Magnetocrystalline Anisotropy of Rare Earth in RCo_(5) have been studied by the single ion (molecular field) approximation. Find the contribution of the neighboring CO ions to crystal fields and higher rank of crystal fields cant be neglected. We calculate the first and second order anisotropy constant K_1,K_2. The magitude of the calculated anisotropy constant is in agreement with the experimental data that are available at extended temperature.