Defect structure of Co2+ center in rhombohedral BaTiO3

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	Defect structure of Co2+ center in rhombohedral BaTiO3
	W. C. Zheng; Y. Mei; X. X. Wu; Q. Zhou
	2007
发表期刊	Optical Materials
ISSN	0925-3467
卷号	29 期号:6 页码:714-717
摘要	The spin-Hamiltonian parameters (g factor g(parallel to), gi(perpendicular to) and hyperfine structure constants A(parallel to), A(perpendicular to)) of Co2+ ion in rhombohedral BaTiO3 crystal are calculated from the perturbation formulas based on the cluster approach for the spin-Hamiltonian parameters of 3d(7) ion in trigonal octahedral site. The calculations are related to the trigonal field parameters and hence to the defect structure of Co2+ center. From the calculations, it is found that in order to reach a good fit between calculations and experiments, the off-center displacement of Co2+ ion in oxygen octahedron of BaTiO3 is much smaller than that of the host Ti4+ ion it replaces. This point is similar to the case of Fe3+ ion in BaTiO3 obtained in the previous studies by analyzing EPR zero-field splitting from the superposition model. (c) 2005 Elsevier B.V. All rights reserved.
部门归属	sichuan univ, dept mat sci, chengdu 610064, sichuan, 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, 29 wangjiang rd, chengdu 610064, sichuan, peoples r china;zhengwcl@163.com
关键词	Defect Structure Electron Paramagnetic Resonance Crystal And ligAnd Field Photorefractive Material Co2++ Batio3 Electron-paramagnetic-resonance Atomic Screening Constants Photorefractive Properties Superposition Model Scf Functions Dependence Position Distance Fields Sites
URL	查看原文
WOS记录号	WOS:000243832200022
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/321006/34090
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. C. Zheng,Y. Mei,X. X. Wu,et al. Defect structure of Co2+ center in rhombohedral BaTiO3[J]. Optical Materials,2007,29(6):714-717.
APA	W. C. Zheng,Y. Mei,X. X. Wu,&Q. Zhou.(2007).Defect structure of Co2+ center in rhombohedral BaTiO3.Optical Materials,29(6),714-717.
MLA	W. C. Zheng,et al."Defect structure of Co2+ center in rhombohedral BaTiO3".Optical Materials 29.6(2007):714-717.