稀土——过渡金属化合物的晶场参数计算公式的推导

Expression of Crystalline—electric—field Parameters for R_nT_m(R=rare earth,T=transition metal)compounds

利用点电荷模型的晶场理论,讨论了稀土——过渡金属化合物晶场参数的计算方法。区分了4f电子有效半径内外的电荷分布对晶场参数的贡献,指出在稀土——过渡金属化合物的磁晶各向异性的分析中,应该考虑正弦Stevens等效算符的贡献。

On the basis of the point charge model,the expressions of the crystalline—electric -field(CEF)parameters for R_nT_m compounds are deduced,and the contributions of charge from the inner and outer region of 4f electrons are distingrished.We also pointed out that sine—CEF parameters should be considered in calculating the magnetocrys- talline anisotropy energy of R_nT_m compounds.