Investigations of the EPR g factors and hyperfine structure constants for two trigonal Co2+ centers in Al2O3 crystals

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	Investigations of the EPR g factors and hyperfine structure constants for two trigonal Co2+ centers in Al2O3 crystals
	W. C. Zheng; X. X. Wu; W. Fang; Y. Mei
	2007
发表期刊	Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
ISSN	1386-1425
卷号	66 期号:4-5 页码:1295-1299
摘要	The EPR g factors g(parallel to), g(perpendicular to) and the hyperfine structure constants A(parallel to), A(perpendicular to) for two trigonal Co2+ centers (i.e. Co2+(I) center at the substitutional site and Co2+(II) center at the interstitial site) in Al2O3 crystals are calculated from the second-order perturbation formulas based on the cluster approach. In these formulas, the contributions to EPR parameters from both the spin-orbit coupling parameter of central 3d(n) ion and that of ligand are included. The calculated results are in reasonable agreement with the observed values. Based on the calculations, the defect structures of both Co2+ centers in Al2O3 crystals are obtained and the negative sign of All for Co2+(I) center is suggested. The results are discussed. (c) 2006 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 Defect Structure Crystal- And Ligand-field Theory Co2++ Al2o3 Electron-paramagnetic-resonance Atomic Screening Constants Optical-absorption Scf Functions Impurities Fields Sites Ions
URL	查看原文
WOS记录号	WOS:000245480400079
引用统计	被引频次：7[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/321006/34095
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. C. Zheng,X. X. Wu,W. Fang,et al. Investigations of the EPR g factors and hyperfine structure constants for two trigonal Co2+ centers in Al2O3 crystals[J]. Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,2007,66(4-5):1295-1299.
APA	W. C. Zheng,X. X. Wu,W. Fang,&Y. Mei.(2007).Investigations of the EPR g factors and hyperfine structure constants for two trigonal Co2+ centers in Al2O3 crystals.Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy,66(4-5),1295-1299.
MLA	W. C. Zheng,et al."Investigations of the EPR g factors and hyperfine structure constants for two trigonal Co2+ centers in Al2O3 crystals".Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy 66.4-5(2007):1295-1299.