波谱学杂志 ›› 1987, Vol. 4 ›› Issue (1): 47-52.

• 研究论文 • 上一篇    下一篇

三角对称晶场下d8电子组态的EPR参量的普遍公式及其应用

白贵儒, 熊权   

  1. 中国科学技术大学 物理系
  • 收稿日期:1986-08-07 修回日期:1986-10-09 出版日期:1987-03-05 发布日期:2018-01-22

THE FORMULAS OF EPR FOR d8 CONFIGURATION IN TRIGONAL CRYSTAL FIELD AND APPLICATION

Bai Guiru, Xiong Quan   

  1. Physics Department, University of Science and Technology of China
  • Received:1986-08-07 Revised:1986-10-09 Online:1987-03-05 Published:2018-01-22

摘要: 本文考虑到d8电子组态中所有自旋三重态和自旋单态对基态的影响,用高阶微扰法导出了d8电子组态在三角对称晶场下光谱和基态EPR普遍公式。发现在三角对称晶场下,d8电子组态离子的g > gg < gD > 0或D < 0是以立方对称晶场为界,晶体中顺磁离子的配体沿C3轴伸长或压缩所致。利用所得公式计算了NiCl2和NiSiF6·6H2O晶体的EPR参量,其结果与实验吻合较好。

关键词: 零场分裂, 三角晶场, d8电子组态, ESR

Abstract: The high order perturbation formulas of EPR parameters for d8 configuration in trigonal crystal field are derived.In our formulas, the contributions due to all excited states including singlets are considered. g > g|| or g < g|| and D > 0 or D< 0 are explained as due to the expanding or contracting of ligands along C3-axis. The formula obtained is applied to deal with EPR parameters of NiCl2 and NiSiF6·6H20 crystals.The agreement of theoretical calculation with experiment shows that the theoretical calculated values are good.

Key words: zero-field split, zero-field split, trigonal crysfal field, d8 configuration