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
刊名	Optical Materials
	2007
卷号	29 期号:6 页码:714-717
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
ISSN号	0925-3467
中文摘要	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.
原文出处	://WOS:000243832200022
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/34090]
专题	金属研究所_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.