超交换作用对Er_3Ga_5O_(12)的磁特性的影响

The role of super-exchange in magnetic properties of paramagnetic Er_3Ga_5O_(12)

考虑交换作用有效场的影响 ,计算了外磁场沿着 [10 0 ]和 [111]方向Er3Ga5O1 2 的磁化强度 ,得到了与实验较符合的结果 ,证明在Er3Ga5O1 2 中 ,超交换作用是不可忽略的因素 .

Magnetization of Er 3Ga 5O 12 is calculated at low temperatures and high magnetic field by using quantum theory. Through quantitive calculation, its magnetization is proved to be complex and anisotropic when the magnetic field is applied parallel to [100] or [111] directions. It can be concluded that super-exchange of paramagnetic is an important factor on the magnetic properties.