KNbO_3:Ir^(4+)晶体自旋哈密顿参量和缺陷结构的研究  

Studies of the spin Hamiltonian parameters and defect structure for KNbO_3:Ir^(4+) crystal

作　　者：刘虹刚[1] 冯文林[1,2] 

机构地区：[1]四川大学材料科学系,成都610064 [2]重庆工学院数理学院应用物理系,杨家坪400050

出　　处：《四川大学学报（自然科学版）》2009年第2期423-425,共3页Journal of Sichuan University(Natural Science Edition)

摘　　要：采用低自旋态(~2T_2)d^5离子在三角对称中的公式,计算了KNbO_3:Ir^(4+)晶体的自旋哈密顿参量g因子g_∥,g_⊥和超精细结构常数A_∥,A⊥。计算结果与实验值符合较好。同时,计算还获得了Ir^(4+)离子在KNbO_3晶体中的缺陷结构信息,对上述结果进行了讨论。Based on the first-order theory of resonance for a low-spin ~2T_2 ground state of 3d^5 ions in trigonal symmetry, the spin-Hamiltonian parameters (g factors g_∥, g_⊥ and hyperfine structure constants A_∥, A_⊥) for Ir^(4+) (5d^5) ion in KNbO_3 crystal are calculated. The calculated results are in good agreement with the experimental values. Meanwhile, the defect structure of Ir^(4+) ion in KNbO_3 crystal is also obtained from the calculations. The results are discussed.

关 键 词：自旋哈密顿参量 缺陷结构 KNbO_3:Ir^4+晶体 

分 类 号：O737[理学—晶体学]