Investigations on the EPR g factors for the six-coordianted Cu2+(1) site in YBa2Cu3O6+x

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	Investigations on the EPR g factors for the six-coordianted Cu2+(1) site in YBa2Cu3O6+x
	S. Y. Wu; J. S. Yao; H. M. Zhang; G. D. Lu
	2007
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	21 期号:18-19 页码:3250-3253
摘要	The EPR g factors g(//) and g(perpendicular to) for the six-coordinated Cu2+(1) site in YBa2Cu3O6+x are theoretically investigated from the perturbation formulas for a 3d(9) ion in tetragonally elongated octahedra. The related tetragonal crystal-field parameters Ds and Dt are determined from the superposition model and the structural data for the Cu2+(1) site, by considering the effective elongation of the oxygen octahedron due to the Jahn-Teller effect of the Cu2+ cluster. Based on the calculations, the effective elongation (= 15%) of the ligand octahedron is obtained for the signals at 100K. As for the EPR signals at room temperature, the elongation declines to merely 4%, corresponding to the smaller anisotropy Delta g (=g(//) - g(perpendicular to)). The theoretical results for the g factors are in good agreement with the observed values, and the local tetragonal distortion due to the Jahn-Teller effect is discussed.
部门归属	[wu, s. y.; yao, j. s.; zhang, h. m.; lu, g. d.] 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, peoples r china;shaoyi_wu@163.com
关键词	Crystal Fields And Spin Hamiltonians Electron Paramagnetic Resonance Cu2++ yba2cu3o6+x Single-crystals Yba2cu3o7-delta Evolution Esr
URL	查看原文
WOS记录号	WOS:000251989900039
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/321006/33917
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Wu,J. S. Yao,H. M. Zhang,et al. Investigations on the EPR g factors for the six-coordianted Cu2+(1) site in YBa2Cu3O6+x[J]. International Journal of Modern Physics B,2007,21(18-19):3250-3253.
APA	S. Y. Wu,J. S. Yao,H. M. Zhang,&G. D. Lu.(2007).Investigations on the EPR g factors for the six-coordianted Cu2+(1) site in YBa2Cu3O6+x.International Journal of Modern Physics B,21(18-19),3250-3253.
MLA	S. Y. Wu,et al."Investigations on the EPR g factors for the six-coordianted Cu2+(1) site in YBa2Cu3O6+x".International Journal of Modern Physics B 21.18-19(2007):3250-3253.