稀土石榴石晶体磁光效应微观机制研究  

THEORETICAL STUDY ON THE MICROSCOPICAL ORIGIN OF THE FARADAY ROTATION IN Ce AND Pr SUBSTITUTED GARNETS

作　　者：张国营[1] 杨杰慧 徐游[3] 

机构地区：[1]枣庄师专物理系 [2]洛阳师专物理系 [3]南京大学物理系

出　　处：《南京大学学报（自然科学版）》1993年第4期586-591,共6页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金资助

摘　　要：本文用量子理论计算了RE∶YIG(RE=Ce,Pr)晶体薄膜中RE离子经晶场和交换作用劈裂后的能级和波函数及4f^n→4f^(n-1)5d^1电偶极跃迁几率,进而计算了该晶体的Faraday旋转,计算结果与实验完全符合.结果表明,RE∶YIG晶体的磁光效应主要来自RE离子4f^n→4f^(n-1)5d^1的电偶极跃迁;晶场与交换作用起着重要作用.The calculation of the Faraday rotation induced by the rare earth ions in the Ce and Pr substituted iron garnets based on the quantum theory is presented. The Faraday rotation contributed by the rare earth ions is caused mainly by the intra-ionic electrical dipole transitions between the 4f^n and 4f^(n-1)5d^1 configurations. The crystal field and the superexchange interaction are two crucial factors in determining the Faraday rotation. The theoretical results are in good agreement with those of experiments.

关 键 词：磁光效应 稀土 石榴石 晶体 

分 类 号：O482.55[理学—固体物理]