EPR parameters and defect structure of paramagnetic Er3+ center in alpha-LiIO3 crystal

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	EPR parameters and defect structure of paramagnetic Er3+ center in alpha-LiIO3 crystal
	S. Y. Wu; W. C. Zheng
	2002
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	346 期号:1-2 页码:41069
摘要	The EPR parameters (g factors g(parallel to), g(perpendicular to) and hyperfine structure constants A(parallel to), A(perpendicular to)) of paramagnetic Er3+ centers in the alpha-LiIO3 crystal are studied from the perturbation formulas of EPR parameters for 4f(11) ion in trigonal symmetry. In these formulas, besides the first-order perturbation contribution considered in previous papers, the second-order perturbation contribution is taken into account, and the crystal-field parameters are estimated from the structural data of Er3+ centers in alpha-LiIO3:Er3+ by using the superposition model. From the studies, it is found that in the Er3+ center the six O2- ions between the Er3+ ion and Li vacancies (V-Li) are shifted away from the V-Li by about 0.037 Angstrom. The shift direction is in agreement with those of the trivalent iron-group ions Cr3+ and Fe3+ in alpha-LiIO3 as well as with the expectation based on the electrostatic interaction model. The EPR parameters g(parallel to), g(perpendicular to), A(parallel to), and A(perpendicular to), for alpha-LiIO3: Er3+ are also reasonably well explained by considering the local lattice relaxation. (C) 2002 Elsevier Science B.V. All fights reserved.
部门归属	sichuan univ, dept mat sci, chengdu 610064, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;wu, sy (reprint author), sichuan univ, dept mat sci, chengdu 610064, peoples r china
关键词	Rare Earth Compounds Crystal Fields Electron Paramagnetic Resonance Superposition-model Single-crystals Generation Linbo3
URL	查看原文
WOS记录号	WOS:000179172500005
引用统计	被引频次：2[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/321006/36456
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Wu,W. C. Zheng. EPR parameters and defect structure of paramagnetic Er3+ center in alpha-LiIO3 crystal[J]. Journal of Alloys and Compounds,2002,346(1-2):41069.
APA	S. Y. Wu,&W. C. Zheng.(2002).EPR parameters and defect structure of paramagnetic Er3+ center in alpha-LiIO3 crystal.Journal of Alloys and Compounds,346(1-2),41069.
MLA	S. Y. Wu,et al."EPR parameters and defect structure of paramagnetic Er3+ center in alpha-LiIO3 crystal".Journal of Alloys and Compounds 346.1-2(2002):41069.