Studies of the defect structures of the trigonal Cr3+-VC centers in fluoroperovskites from EPR and optical spectra

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	Studies of the defect structures of the trigonal Cr3+-VC centers in fluoroperovskites from EPR and optical spectra
	W. C. Zheng; Q. Zhou; X. X. Wu; Y. Mei
	2006
发表期刊	Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
ISSN	1386-1425
卷号	63 期号:1 页码:126-129
摘要	The EPR parameters (zero-field splitting D and g factors g(vertical bar vertical bar), g(perpendicular to)) and the first excited state splitting Delta(E-2) of the trigonal Cr3+-Vc centers (Vc denotes the cation vacancy in a C-3 axis) in Cr3+-doped fluoroperovskites KMgF3, KZnF3, CsCdF3, CsCaF3, RbCdF3 and BaLiF3 are studied from the high-order perturbation formulas. From the studies, the defect structures (characterized by the vacancy-induced displacements Delta(x1) of Cr3+ ion and Delta x(2) of the three F- ion between Cr3+ and Vc) of these trigonal Cr3+-Vc centers are determined. It is found that the signs of displacements Delta x(1) and Delta x(2) are consistent with the expectations based on the electrostatic interactions, and the magnitudes of Delta x(1) and Delta x(2) for Cr3+ in the inverse perovskite BaLiF3 are larger than those for Cr3+ in the classical perovskites. The results are discussed. (c) 2005 Elsevier B.V. All rights reserved.
部门归属	sichuan univ, dept mat sci, chengdu 610064, peoples r china. civil aviat flying inst china, dept phys, guanghan 618307, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;zheng, wc (reprint author), sichuan univ, dept mat sci, chengdu 610064, peoples r china;zhengwc1@163.com
关键词	Electron Paramagnetic Resonance Optical Spectra Defect Structure Cr3++ Abf(3) Spectroscopic Properties Superposition Model Laser Resonance Kznf3 Kmgf3
URL	查看原文
WOS记录号	WOS:000234282000020
引用统计	被引频次：27[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/321006/34761
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. C. Zheng,Q. Zhou,X. X. Wu,et al. Studies of the defect structures of the trigonal Cr3+-VC centers in fluoroperovskites from EPR and optical spectra[J]. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,2006,63(1):126-129.
APA	W. C. Zheng,Q. Zhou,X. X. Wu,&Y. Mei.(2006).Studies of the defect structures of the trigonal Cr3+-VC centers in fluoroperovskites from EPR and optical spectra.Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,63(1),126-129.
MLA	W. C. Zheng,et al."Studies of the defect structures of the trigonal Cr3+-VC centers in fluoroperovskites from EPR and optical spectra".Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy 63.1(2006):126-129.