EPR parameters and defect structures for the Co2+ ions in LiNbO3 and LiTaO3 crystals

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	EPR parameters and defect structures for the Co2+ ions in LiNbO3 and LiTaO3 crystals
	M. Yang; W. Xiao-Xuan; Z. Wen-Chen
	2008
发表期刊	Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
ISSN	1386-1425
卷号	71 期号:2 页码:714-719
摘要	The electron paramagnetic resonance (EPR) parameters (g factors g parallel to, g perpendicular to and hyperfine structure constants A parallel to, A perpendicular to) for Co2+ ions in LiNbO3 and LiTaO3 crystals are calculated from the second-order perturbation formulas based on the cluster approach for 3d(7) ions in trigonal octahedral clusters. The calculated results are in reasonable agreement with the experimental values. From the calculations, the negative sign of All for Co2+, in the two crystals and the more exact and rational values of A parallel to for Co2+ in LiTaO3 are suggested. The defect structures (characterized by the Co2+ displacement Delta Z along C-3 axis and the O2- displacement Delta X in an oxygen triangle towards the center of the triangle) for the Co2+ centers in both crystals are estimated. The results are discussed. (c) 2008 Elsevier B.V. All rights reserved.
部门归属	[yang, mei; wen-chen, zheng] sichuan univ, dept mat sci, chengdu 610064, peoples r china. [xiao-xuan, wu] civil aviat flight univ china, dept phys, guanghan 618307, peoples r china. [wen-chen, zheng] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;wen-chen, z (reprint author), sichuan univ, dept mat sci, chengdu 610064, peoples r china;zhengwc1@163.com
关键词	Electron Paramagnetic Resonance Defect Structure Crystal- And Ligand-field Theory Co2++ Linbo3 Litao3 Electron-paramagnetic-resonance Atomic Screening Constants Lithium-niobate Optical-spectra Scf Functions Lattice Oscillator Impurity
URL	查看原文
WOS记录号	WOS:000261046200067
引用统计	被引频次：9[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/321006/33274
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. Yang,W. Xiao-Xuan,Z. Wen-Chen. EPR parameters and defect structures for the Co2+ ions in LiNbO3 and LiTaO3 crystals[J]. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,2008,71(2):714-719.
APA	M. Yang,W. Xiao-Xuan,&Z. Wen-Chen.(2008).EPR parameters and defect structures for the Co2+ ions in LiNbO3 and LiTaO3 crystals.Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,71(2),714-719.
MLA	M. Yang,et al."EPR parameters and defect structures for the Co2+ ions in LiNbO3 and LiTaO3 crystals".Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy 71.2(2008):714-719.