波谱学杂志 ›› 1999, Vol. 16 ›› Issue (4): 323-328.

• 研究论文 • 上一篇    下一篇

ZnAl2O4:Cr3+晶体4A2基态ZFS及其三角晶格畸变研究

杨子元, 邰持明, 郑俊博   

  1. 宝鸡文理学院物理学系, 宝鸡 721007
  • 收稿日期:1999-03-03 修回日期:1999-04-13 出版日期:1999-08-05 发布日期:2018-01-11
  • 作者简介:杨子元,男,1962年出生,硕士,副教授
  • 基金资助:
    陕西省教委专项基金资助项目(98JK007),陕西省自然科学基金资助项目

AN INVESTIGATION FOR THE ZFS PARAMETERS OF THE 4A2-GROUND STATE AND THE CRYSTAL LATTICE DISTORTION OF THE TRIGONAL SYMMETRY IN ZnAl2O4:Cr3+

Yang Ziyuan, Tai Chiming, Zheng Junbo   

  1. Department of Physics, Baoji College of Arts and Science, Baoji 721007
  • Received:1999-03-03 Revised:1999-04-13 Online:1999-08-05 Published:2018-01-11

摘要: 用对角化哈密顿矩阵的方法,借助New man晶场叠加模型,研究了ZnAl2O4:Cr3+晶体的基态零场分裂(ZFS)及其电子光谱,理论结果与实验一致.定量研究表明,掺杂晶体ZnAl2O4:Cr3+中,络离子(CrO6)9-局域结构应有压缩的三角畸变(△θ=3.06°).同时指出,自旋二重态对4A2基态ZFS参量b20的贡献不可忽略,而对g因子的贡献甚微.

关键词: ZnAl2O4:Cr3+, 零场分裂, 晶格畸变, 电子光谱

Abstract: In this paper, the zero-field-splitting parameter b20 and the electron spectra of ZnAl2O4:Cr3+ crystal have been studied in terms of the Newman superposition model and the method of the diagonalization Hamiltonian matrices, the calculated results agree well with the experiments. The investigations show that the local structure of the (CrO6)9- group in the ZnAl2O4:Cr3+ Crystal is of the compressed trigonal distortion (△ θ=3.06°), and point out that the spin doublets can not be omitted for the ZFS parameter of the ground state 4A2, and it can be omitted for the ground state g factor.

Key words: ZnAl2O4:Cr3+, Zero-field splitting, Lattice distortion, Electron spectra