Bi－YIG磁光法拉第效应的微观机理研究  

The Study of Microscopic-Mechanism of Magneto-Optical Faraday Effect in Bi-YIG

作　　者：胡华安[1] 何华辉[1] 

机构地区：[1]华中理工大学固体电子学系

出　　处：《河北师范大学学报（自然科学版）》1995年第S1期12-15,共4页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金

摘　　要：考虑Ｂｉ３＋的６ｐ电子轨道、Ｏ２－的２ｐ电子轨道、Ｆｅ３＋的３ｄ电子轨道重迭成杂化的分子轨道，并将Ｂｉ离子的浓度与杂化轨道联系起来。在ω＝２．３ｅＶ和ω＝２．８ｅＶ分别讨论了ｘ＝０，０．１，０．３，０．５时，Ｙ３－ｘＢｉｘＦｅ５Ｏ１２（Ｂｉ－ＹＩＧ）的法拉第旋转角随激发态的自旋轨道劈裂能△的变化情况。结果表明，由于Ｂｉ３＋的掺入，Ｂｉ－ＹＩＧ的法拉第旋转角随激发态的自旋轨道相互作用增加而迅速增加．For the bismuth substituted yttrium iron garnet (Bi-YIG),it is considered that the 6p orbits of Bi3+,2p orbits of O2-,and 3d orbits of Fe3+ are overlaped one another into hybridized molecular orbits. The number of hybridized orbits is related with the ion concentration of Bi3+.When ω= 2. 3 eV or ω= 2. 8 eV,the 0F varied with the spin-orbit splitting energies is calculated respectively,in Y3-xBixFe5O12 on x= 0,0.1,0.3,0.5. The results indicate that the large enhancement of the Faraday rotation,with the enhancement of spin-orbit splitting of excited state,is dominated by the substitution of bismuth.

关 键 词：杂化分子轨道 自旋轨道相互作用 法拉第旋转 

分 类 号：O441.4[理学—电磁学]