Study of EPR parameters and defect structure for two tetragonal impurity centers in MgO:Cr3+ and MgO:Mn4+ crystals

doi:10.1007/s00723-009-0181-5

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	Study of EPR parameters and defect structure for two tetragonal impurity centers in MgO:Cr3+ and MgO:Mn4+ crystals
	Wu, X-X 1; Fang, W.2; Feng, W-L 2,3; Zheng, W-C 2,4
通讯作者	Wu, X-X(wxxdd@163.com)
	2009-05-01
发表期刊	APPLIED MAGNETIC RESONANCE
ISSN	0937-9347
卷号	35 期号:4 页码:503-510
摘要	The electron paramagnetic resonance (EPR) parameters (g-factors g (aEuro-), g (aSyen) and zero-field splitting D) of two tetragonal 3d(3) impurity centers M-3d-V-Mg and M-3d-Li+ (where M-3d = Cr3+ or Mn4+, V-Mg is the Mg2+ vacancy) in M-3d-doped MgO crystals are calculated from the high-order perturbation formulas including both the crystal-field (CF) and the charge-transfer (CT) mechanisms for 3d(3) ions in the tetragonal symmetry. The calculated results are in reasonable agreement with the experimental values. From the calculations, it can be found that the relative importance of the CT mechanism for EPR parameters increases with increasing valence state of the 3d(3) ion. So, for the high-valence 3d (n) ions in crystals, a reasonable explanation of EPR parameters should take into account both CF and CT mechanisms. The defect structures (characterized by the displacement Delta R of O2- in the intervening M-3d and V-Mg or Li+ at the Mg2+ site) for these tetragonal impurity centers are obtained from the calculations. The results are consistent with the expectations based on the electrostatic interactions.
DOI	10.1007/s00723-009-0181-5
收录类别	SCI
语种	英语
WOS研究方向	Physics ; Spectroscopy
WOS类目	Physics, Atomic, Molecular & Chemical ; Spectroscopy
WOS记录号	WOS:000266072400002
出版者	SPRINGER WIEN
引用统计	被引频次：15[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/321006/96791
专题	中国科学院金属研究所
通讯作者	Wu, X-X
作者单位	1.Civil Aviat Flight Univ China, Dept Phys, Guanghan 618307, Peoples R China 2.Sichuan Univ, Dept Mat Sci, Chengdu 610064, Peoples R China 3.Chongqing Inst Technol, Dept Appl Phys, Chongqing, Peoples R China 4.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Wu, X-X,Fang, W.,Feng, W-L,et al. Study of EPR parameters and defect structure for two tetragonal impurity centers in MgO:Cr3+ and MgO:Mn4+ crystals[J]. APPLIED MAGNETIC RESONANCE,2009,35(4):503-510.
APA	Wu, X-X,Fang, W.,Feng, W-L,&Zheng, W-C.(2009).Study of EPR parameters and defect structure for two tetragonal impurity centers in MgO:Cr3+ and MgO:Mn4+ crystals.APPLIED MAGNETIC RESONANCE,35(4),503-510.
MLA	Wu, X-X,et al."Study of EPR parameters and defect structure for two tetragonal impurity centers in MgO:Cr3+ and MgO:Mn4+ crystals".APPLIED MAGNETIC RESONANCE 35.4(2009):503-510.