稀土化合物ReRhZn(Re=Ce,Pr,Nd)的磁性模拟和晶场效应  

Magnetism Simulation and Crystal Field of ReRhZn (Re =Ce,Pr,Nd) Rear-earth Compounds

作　　者：路莹[1] 付宏志[1] 薛绛琴[2] 路庆凤[2] 

机构地区：[1]洛阳师范学院物理系,河南洛阳471023 [2]河南师范大学物理与信息工程学院,河南新乡453007

出　　处：《磁性材料及器件》2010年第2期19-21,共3页Journal of Magnetic Materials and Devices

基　　金：河南省教育厅科技攻关基金资助项目(2009B590001)

摘　　要：基于晶场理论,通过对Hermes等人磁化率倒数与温度关系曲线的模拟,得到了稀土化合物ReRhZn(Re=Ce,Pr,Nd)的晶场系数、晶场分裂能和相应波函数。它们的第一激发能和总激发能分别为:43.02meV,186.1meV;0.037meV,52.59meV和0.56meV,4.66meV。结果表明,Kramers离子Ce3+在晶场效应的作用下,基态简并部分消除得到了双重态,而非Kramers离子Pr3+分裂为9个单态,Nd3+分裂为5个单态,模拟结果与实验曲线吻合很好。Based on crystalline electric field （CEF） theory, we simulated the temperature dependence of inverse magnetic, susceptibility measured by Wilfried Hermes group before. Using CEF theory, we obtained CEF splitting levels and corresponding wave functions for rare earth compounds ReRhZn, （Re=Ce,Pr,Nd）. The first excited and the total excited energies are estimated to be about 43.02meV and 186.1 meV（for CeRhZn）; 0.037 meV and 52.59 meV（for PrRhZn） and 0.56 meV and 4.66 meV（for NdRhZn）, respectively. The result indicated that Kramers ion Ce^3＋ has a doublet ground state while non Kramers ion Pr^3＋ has 9 singlet states, ion Nd^3＋ has 5 singlet states. The result of simulating is in good agreement with experiment data. This study provides a reference for the nature of magnetic structures of ReRhZn（Re=Ce,Pr,Nd）.

关 键 词：CeRhZn PrRhZn NdRhZn 磁化率 晶场效应 

分 类 号：O482.54[一般工业技术—材料科学与工程]