[4] D. L. Wood, J. Ferguson, K. Knox et al.. Crystal-field spectra of d3,7 ions. Ⅲ. spectrum of Cr3+ in various octahedral crystal fields[J]. J. Chem. Phys., 1963, 39(4): 890～894

[5] Xiaoming Bai, Lingwen Zeng. Anisotropic broadening of the linewidth in the EPR spectra of Cr3+ ions in various doped yttrium aluminum garnet single crystals[J]. Phys. Rev. B, 1989, 39(1): 10～14

[6] Gerald Burns, E. A. Geiss, B. A. Jenkins et al.. Cr3+ fluorescence in garnets and other crystals[J]. Phys. Rev., 1965, 139(5A): 1687～1693

[9] Yu Wanlun. Net-charge-compensation effects on the crystal field and the spin Hamiltonian for the Fe3+ ions at the K+-vacancy sites in Fe3+∶KZnF3 and Fe3+ ∶KMgF3 crystals[J]. Phys. Rev. B, 1995, 52(6): 4237～4244

[17] Hisashi Horie. Spin-spin and spin-other-orbit interaction[J]. Progress of Theoretical Physics, 1953, 10(3): 296～308

[18] R. E. Trees. Spin-spin interaction[J]. Phys. Rev.,1951, 82(5): 683～688

[20] Zhao Minguang, Du Maolu, Sen Guoyin. A μ-k-α correlation ligand-field model for the Ni2+-6X-cluster[J]. J. Phys. C: Solid State Phys., 1987, 20(33): 5557～5571