三角对称下3d3离子2E态g因子性质研究

采用完全对角化方法，以尖晶石结构的ZnAl₂Ｏ₄:Cr^3＋，ZnGa₂Ｏ₄:Cr^3＋和MgAl₂Ｏ₄:Cr^3＋系列晶体为例，联系晶格局域结构，对三角对称下3d³离子²E态g因子性质进行了研究.研究中考虑了包括自旋与自旋相互作用、自旋与另一轨 关键词： 2E态g因子')" href="#">²E态g因子 3离子')" href="#">3d³离子 尖晶石结构 磁相互作用

On the g factors of 2E state for 3d3ions at trigonal symmetry

In connection with local structure, the g factors of ²E state are studied by using complete diagonalization method （CDM）, with the spinel type crystals ZnAl₂Ｏ₄:Cr^3＋, ZnGa₂Ｏ₄:Cr^3＋ and MgAl₂Ｏ₄:Cr^3＋ as the cases. The slight magnetic interactions, including spin-spin （SS）, spin-other-orbit （SOO） and orbit-orbit （OO） interactions are taken into account in our investigations. Theoretical explanations of g factors of ²E state for ZnAl₂Ｏ₄:Cr^3＋ have been given. The results show that the sign of g_‖（E′） for ZnGa₂Ｏ₄:Cr^3＋ should be negative. And the value of g factors of ²E state for MgAl₂Ｏ₄:Cr^3＋ have been predicted. It is shown that, the contributions to g factors of ²E state from slight magnetic interactions are appreciable. Compared with the g factors of ground state, the g factors of ²E state are sensitive to the local structure.