Ce_3Rh_3Si_2和CeRh_3Si_2的磁性模拟和晶场效应研究  

MAGNETISM SIMULATION AND STUDY OF CRYSTALLINE ELECTRIC FIELD OF Ce_3Rh_3Si_2 AND CeRh_3Si_2

作　　者：路莹[1] 张蕾[1] 薛绛琴[2] 路庆凤[2] 

机构地区：[1]河南洛阳师范学院物理系,河南洛阳471022 [2]河南师范大学物理与信息工程学院,河南新乡453007

出　　处：《低温物理学报》2009年第3期245-248,共4页Low Temperature Physical Letters

基　　金：河南省教育厅自然科学基金(2007140011;2007140008)资助的课题~~

摘　　要：根据晶场理论,通过对D.Kaczorowski等人测量的磁化率倒数与温度关系曲线的模拟,得到了稀土化合物CeRh3Si2和Ce3Rh3Si2的晶场分裂能和相应波函数.对于CeRh3Si2和Ce3Rh3Si2,它们的第一激发能和总的激发能分别为176K,855K和77.5K,428K.计算表明,Kramers离子Ce3+在晶场效应的作用下,基态简并部分消除得到了三个双重态,模拟得到的化合物的磁化率倒数与温度关系曲线与实验曲线吻合较好.On the base of crystalline electric field （CEF） theory with a simple point-charge CEF model by means of simulating the temperature dependence of inverse magnetic susceptibility measured by D. Kaczorowski group, we obtained CEF splitting levels and corresponding wave functions for rare earth compounds CeRh3 Si2 and Ce3 Rh3 Si2, The first excited and the total excited energies are estimated to be about 176K, 855 K,for CeRh3 Si2 and 26K, 1430K for Ce3 Rh3 Si2, respectively. The calculation indicated the CEF analysis shows that Kramers ion Ce^3＋ have three doublet ground state. The result of simulating are in good agreement with the experimental date.

关 键 词：Ce3Rh3Si2 CeRh3Si2 磁化率 晶场效应 

分 类 号：O482.5[理学—固体物理]