Theoretical studies of the zero-field splitting and g factor for Gd3+ in La2-xSrxCuO4

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	Theoretical studies of the zero-field splitting and g factor for Gd3+ in La2-xSrxCuO4
	S. Y. Wu; H. M. Zhang; G. D. Lu; J. S. Yao
	2007
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	21 期号:18-19 页码:3254-3257
摘要	The zero-field splitting D of the S-8(7/2) ground singlet for the tetragonal Gd3+ center in La2-xSrxCuO4 is theoretically studied from the superposition model. Meanwhile, the g factor is also quantitatively investigated from the approximation formula including admixture of the ground 8S7/2 and the excited L-6(7/2) (L=P, D, F, G) states via the spin-orbit coupling interactions. The calculated zero-field splitting and g factor are in reasonable agreement with the experimental data. It is found that the significant zero-field splitting can be ascribed to the average impurity-ligand bonding angles [approximate to (theta(1) + theta(2))/2 approximate to 62 degrees] related to the four-fold axis larger than that (approximate to 54.74 degrees) of the cubic case. Nevertheless, the experimental g factor close to 2 may be largely due to the very slight admixture of the ground 8S7/2 and the excited L-6(7/2) states via the spin-orbit coupling interactions.
部门归属	[wu, s. y.; 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;shaoyi_wu@163.com
关键词	Crystal Fields And Spin Hamiltonians Epr Gd3++ La2-xsrxcuo4 Energy Levels Superconductor Epr
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WOS记录号	WOS:000251989900040
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33918
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Wu,H. M. Zhang,G. D. Lu,et al. Theoretical studies of the zero-field splitting and g factor for Gd3+ in La2-xSrxCuO4[J]. International Journal of Modern Physics B,2007,21(18-19):3254-3257.
APA	S. Y. Wu,H. M. Zhang,G. D. Lu,&J. S. Yao.(2007).Theoretical studies of the zero-field splitting and g factor for Gd3+ in La2-xSrxCuO4.International Journal of Modern Physics B,21(18-19),3254-3257.
MLA	S. Y. Wu,et al."Theoretical studies of the zero-field splitting and g factor for Gd3+ in La2-xSrxCuO4".International Journal of Modern Physics B 21.18-19(2007):3254-3257.