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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 .
Under the single-electron model, the anti-magnetic Faraday rotation (FR) spectrum of Pr3 + ions in Pr: YIG crystal was studied by quantum theory. The changes of λF-1 2θ λ2 of Pr3 + ion were calculated at 77K and 30 0K respectively The calculated results are in good agreement with the experimental data. It is confirmed that the crystal field is a single-state ion, and the diamagnetic FR has a greater dependence on the exchange field (or the external field) than the paramagnetic FR and is temperature dependent. In a switched-site environment, the contribution of the two rotations to FR is of equal importance.