Investigation of the local geometry and EPR parameters of V3+ and Cr4+ Centers in Al2O3 crystals

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	Investigation of the local geometry and EPR parameters of V3+ and Cr4+ Centers in Al2O3 crystals
	W. L. Feng; X. X. Wu; F. Wang; W. C. Zheng
	2006
发表期刊	Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences
ISSN	0932-0784
卷号	61 期号:12 页码:691-694
摘要	The EPR parameters (zero-field splitting D and g factors g(parallel to), g(perpendicular to)) of 3d(2) V3+ and Cr4+ centers in Al2O3 crystals are calculated by using the diagonalization of the complete energy matrix for 3d(2) ions in trigonal symmetry. The crystal-field parameters are estimated for the superposition model related to the local geometry (or structure) of the impurity centers. From the calculations, the EPR parameters for both impurity centers are explained and the local structures (characterized by the impurity displacement Delta z along the C-3 axis and the displacement Delta x of O2- ions in the oxygen triangle between the impurity and the vacant oxygen octahedron along the x-axis, resulting from the electrostatic repulsive force and the electronic cloud overlap) of these impurity centers are estimated. The results are discussed.
部门归属	chongqing inst technol, dept appl phys, chongqing 400050, peoples r china. civil aviat flying inst china, dept phys, guanghan 618307, peoples r china. sichuan univ, dept mat sci, chengdu 610064, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;feng, wl (reprint author), chongqing inst technol, dept appl phys, chongqing 400050, peoples r china;wenlinfeng@126.com
关键词	Electron Paramagnetic Resonance Defect Structure Crystal-field Theory V3++ Cr4++ Al2o3 Optical Spectra Cr3++ Ions Corundum Ruby Fields
URL	查看原文
WOS记录号	WOS:000243784400013
引用统计	被引频次：10[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/321006/34198
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. L. Feng,X. X. Wu,F. Wang,et al. Investigation of the local geometry and EPR parameters of V3+ and Cr4+ Centers in Al2O3 crystals[J]. Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences,2006,61(12):691-694.
APA	W. L. Feng,X. X. Wu,F. Wang,&W. C. Zheng.(2006).Investigation of the local geometry and EPR parameters of V3+ and Cr4+ Centers in Al2O3 crystals.Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences,61(12),691-694.
MLA	W. L. Feng,et al."Investigation of the local geometry and EPR parameters of V3+ and Cr4+ Centers in Al2O3 crystals".Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences 61.12(2006):691-694.