MnFe_2O_4晶体的基态能级和零场分裂参量

Ground states energy levels and zero-field splitting parameters in MnFe_2O_4 crystal

由不可约张量理论构成一个 3d4/ 3d6离子三角 (C3V)对称的晶体场和自旋 轨道相互作用哈密顿矩阵 ,由这个晶体场和自旋 轨道相互作用哈密顿矩阵被完全对角化后能够求出MnFe2 O4晶体中的Fe2 +离子的电子顺磁共振零场分裂参量D和F -a ,计算了低自旋态 ( 3 L态 )对电子顺磁共振零场分裂参量 (D ,F-a)的贡献。结果显示低自旋3 L态对电子顺磁共振的零场分裂参量的贡献是较强的。

The crystal field and spin orbit interaction complete diagonalizing Hamiltonian matrix of 3d 4/3d 6 ions have been composed by irreducible representation method.The zero field spltting parameters D and F-a of Fe 2+ ions in MnFe 2O 4 crystal are presented by the crystal field and spin orbit interaction complete diagonalizing Hamiltonian matrix with theory of electron paramagnetic resonance. At the same time, the contribution of low spin states to zero field splitting parameters have been studied. The results show that contribution of low spin states to zero field splitting parameters is important and strong. The calculated results are in good agreement with the experimental data.