含钕石榴石磁光效应的量子理论  

Quantum theory of the magneto-optical effect of Nd-substituted yttrium iron garnet

作　　者：张芳[1] 王爱芳[2] 李青华[1] 杨杰慧[3] 

机构地区：[1]青岛大学师范学院物理系,山东青岛266071 [2]山东大学威海分校,山东威海264209 [3]洛阳师范学院物理系,河南洛阳471022

出　　处：《华中师范大学学报（自然科学版）》2003年第4期484-487,共4页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金(10374054);河南省自然科学基金(0111050600);河南省教育厅自然科学基础研究资助项目(2000140009;20011400011).

摘　　要：应用量子理论分析了含钕石榴石中Nd3+离子的磁光效应;计算了50～300K温度范围内离子的Faraday偏转及300K时Faraday偏转与光子能量的函数关系.计算结果表明,Nd:YIG中Nd3+离子的磁光效应主要源于离子内4f3→4f25d的电偶极跃迁;离子能级由于旋轨耦合、晶场作用及超交换作用而劈裂;实验观察到的Faraday偏转为顺磁性的.计算结果与实验符合良好.The magneto-optical effects of Nd^(3+) ions in Nd-substituted yttrium iron garnet are analyzed by using quantum theory. The calculation of Faraday rotation in the temperature range 50-300 K are presented. The calculation of the photon energy dependence of Faraday rotation at 300 K is presented as well. The results show that the magneto-optical effect of Nd^(3+) ions in Nd:YIG originates mainly from the intra-ionic electric dipole transitions between the 4f^3 and 4f^25d states split by the spin-orbit, crystal field, and superexchange interactions. The observed Faraday rotation is of the paramagnetic type. The calculated results are in good agreement with experiments.

关 键 词：含钕石榴石 磁光效应 Faraday偏转 

分 类 号：O482.55[理学—固体物理]