Pr:YIG晶体抗磁性Faraday转动谱的研究  

Investigation on the diamagnetic Faraday rotation spectra in Pr-substituted yttrium iron garnet

作　　者：张国营[1] 张学龙[2] 程勇[1] 薛刘萍[1] 韩奎[1] 

机构地区：[1]中国矿业大学理学院,徐州221008 [2]上海理工大学医疗器械学院,上海200093

出　　处：《物理学报》2005年第1期407-410,共4页Acta Physica Sinica

基　　金：上海市自然科学基金 (批准号 :0 3ZR14 0 71)资助的课题~~

摘　　要：在单电子模型下 ,用量子理论研究了Pr:YIG晶体中Pr3+离子的抗磁性Faraday转动 (FR)谱 .分别在温度为 77K和 30 0K时 ,计算了Pr3+离子的λF- 1 2θ λ2 的变化关系 ,计算结果与实验值符合较好 .证实了晶场为单态的离子 ,其抗磁性FR比顺磁性FR对交换场 (或外场 )有更大的依赖性 ,且与温度有关 .在强交换场环境中 ,两种转动对FR的贡献有相同的重要性 .By using the single particle model, the diamagnetic Faraday rotation (FR) spectra of pr(3+) ion in Pr:YIG crystal is presented based on the quantum theory. The linear dependence of lambdaF(0)(-1/2) on lambda(2) is calculated at 300 and 77K in the 1.05-1.3 micron wavelength range. It is found that the diamagnetic FR is 64% of paramagnetic FR at 77K and the two types of FR can be of more or less equal importance. The diamagnetic FR depends on the temperature and the exchange field for the ions with orbit single ground states derived from the crystal field.

关 键 词：抗磁性 转动 晶体 离子 晶场 FR 量子理论 依赖性 实验 研究 

分 类 号：O734[理学—晶体学] O511