Theoretical studies of the g factors and local structure for Pt3+ in alpha-Al2O3

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	Theoretical studies of the g factors and local structure for Pt3+ in alpha-Al2O3
	Z. H. Zhang; S. Y. Wu; S. X. Zhang; L. L. Li
	2012
发表期刊	Pramana-Journal of Physics
ISSN	0304-4289
卷号	78 期号:3 页码:475-482
摘要	The anisotropic g factors and local structure for the trigonal Pt3+ centre in alpha-Al2O3 are theoretically investigated from the perturbation formulas of the g factors for a 5d(7) ion in trigonal symmetry. The Pt3+ impurity is found to experience an outward displacement by about 0.18 angstrom away from the centre of the oxygen octahedron along the C-3-axis. The calculated g factors based on the above axial displacement show good agreement with the observed values. Importantly, the pending problem of +3 valence state of the doped Pt in alpha-Al2O3 is theoretically clarified, and the possibility of Pt+ (5d(9)) is thus excluded in this work.
部门归属	[zhang, z. h.; wu, s. y.; zhang, s. x.; li, l. l.] univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china. [wu, s. y.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;wu, sy (reprint author), univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china.;shaoyi_wu@163.com
关键词	Electron Paramagnetic Resonance (Epr) Impurities And Defects Pt3++ Alpha-al2o3 Electron-paramagnetic Resonance Atomic Screening Constants Superposition Model Supported Platinum Optical Spectra Crystal Fields Scf Functions Cobalt Ions Epr-spectra Complexes
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60472
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. H. Zhang,S. Y. Wu,S. X. Zhang,et al. Theoretical studies of the g factors and local structure for Pt3+ in alpha-Al2O3[J]. Pramana-Journal of Physics,2012,78(3):475-482.
APA	Z. H. Zhang,S. Y. Wu,S. X. Zhang,&L. L. Li.(2012).Theoretical studies of the g factors and local structure for Pt3+ in alpha-Al2O3.Pramana-Journal of Physics,78(3),475-482.
MLA	Z. H. Zhang,et al."Theoretical studies of the g factors and local structure for Pt3+ in alpha-Al2O3".Pramana-Journal of Physics 78.3(2012):475-482.