Ce∶YIG自旋-轨道耦合对磁光效应的影响

EFFECT OF SPIN-ORBIT INTERACTION STRENGTH ON THE FARADAY ROTATION IN Ce-SUBSTITUTED YTTRIUM GARNET 

计算了Ce∶YIG中Ce3+离子自旋 轨道耦合对磁光效应的影响 ,计算结果表明 ,Ce3+离子基态的自旋 轨道耦合对磁光效应有很大影响 ,Faraday旋转与λf(基态的自旋 轨道耦合系数与其正常值的比值 )不是线性关系 ,在λf 约为 0 3时 ,Faraday旋转有明显的峰值 ,激发态的自旋 轨道耦合对磁光效应影响很小 .

The effect of the spin\|orbit interaction of both the ground and excited configurations on the Faraday rotation of Ce\|substituted yttrium gamet has been calculated. It is found that the influence of spin\|orbit coupling strength of the ground configuration on the Faraday rotation is large; however, the Faraday rotation does not scale linearly with the spin\|orbit coupling. It varies in a complex way as λ \-f(the ratio of real value to the normal one of the spin\|orbit coefficient in ground state) changes and reaches a maximum when λ f is about 0\^3. It is surprising that the influence of spin\|orbit coupling strength of the excited configuration on the Faraday rotation is very small.