Studies on the local angular distortions around the impurity Co2+ in CdCl2, CdBr2 and PbI2

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	Studies on the local angular distortions around the impurity Co2+ in CdCl2, CdBr2 and PbI2
	S. Y. Wu; G. D. Lu; H. M. Zhang; J. S. Yao
	2007
发表期刊	Radiation Effects and Defects in Solids
ISSN	1042-0150
卷号	162 期号:5-6 页码:393-399
摘要	The local angular distortions around the impurity Co2+ in CdCl2, CdBr2 and PbI2 are theoretically studied from the perturbation formulas of the electron paramagnetic resonance (EPR) parameters, the g factors g(//) and g(perpendicular to) and the hyperfine structure constants A(//) and A(perpendicular to) for a 3d(7) ion in trigonal symmetry. In these formulas, the contributions from the s-orbitals of the ligands, which were often ignored, are taken into account based on the cluster approach. By analyzing the EPR spectra, we find that the impurity-ligand bonding angles beta related to the C-3 axis in the Co2+ impurity centers are different from the corresponding metal-ligand bonding angles beta(H) in the hosts, characterized by the local angular distortions Delta beta (=beta - beta(H)). The calculated EPR parameters, especially the anisotropies of the g and A factors for the studied systems based on the local angular distortions Delta beta, show reasonable agreement with the observed values.
部门归属	univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;wu, sy (reprint author), univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china;shaoyi_wu@163.com
关键词	Defect Structures Electron Paramagnetic Resonance (Epr) Crystal- And Ligand-fields Co2++ Cdcl2 Cdbr2 Pbi2 Electron-paramagnetic Resonance Atomic Screening Constants Superposition Model Scf Functions Crystals Ions Parameters Chloride Spectra Mn
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WOS记录号	WOS:000248415200013
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33915
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Wu,G. D. Lu,H. M. Zhang,et al. Studies on the local angular distortions around the impurity Co2+ in CdCl2, CdBr2 and PbI2[J]. Radiation Effects and Defects in Solids,2007,162(5-6):393-399.
APA	S. Y. Wu,G. D. Lu,H. M. Zhang,&J. S. Yao.(2007).Studies on the local angular distortions around the impurity Co2+ in CdCl2, CdBr2 and PbI2.Radiation Effects and Defects in Solids,162(5-6),393-399.
MLA	S. Y. Wu,et al."Studies on the local angular distortions around the impurity Co2+ in CdCl2, CdBr2 and PbI2".Radiation Effects and Defects in Solids 162.5-6(2007):393-399.