Investigations of the defect structure for Cu2+ in SrLaAlO4

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	Investigations of the defect structure for Cu2+ in SrLaAlO4
	W. H. Wei; S. Y. Wu; H. N. Dong
	2005
发表期刊	Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences
ISSN	0932-0784
卷号	60 期号:7 页码:541-544
摘要	The defect structure for Cu2+ in SrLaAlO4 is theoretically investigated by the perturbation formulas of the spin Hamiltonian parameters (g factors g(vertical bar vertical bar), g(perpendicular to) and the hyperfine structure constants All and A(perpendicular to)) for a 3d(9) ion in tetragonally elongated octahedra. Based on these studies, the tetragonal center may be attributed to Cu2+ occupying the host Al3+ site, associated with one hole delocalized at the four oxygen ligands in planar coordination. Furthermore, the four Cu,O bonds (perpendicular to the four-fold axis) are found to suffer an outward stretch of about 0.06 angstrom due to (i) the local tenseness in this plane, arising from the size mismatching substitution of the smaller Al3+ by the larger Cu2+ and (ii) the weaker electrostatic attraction of the less charged Cu2+ acting upon the four oxygen ions containing the delocalized hole. The calculated spin Hamiltonian parameters agree well with the experimental data. The defect structure of this center is discussed.
部门归属	univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. chongqing univ, coll elect engn, chongqing 400065, 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) Defect Structure Crystal-field And Spin Hamiltonians Cu2++ Srlaalo4 Brillouin-scattering Superposition Model Single-crystals Srlagao4 Ions Epr Parameters Resonance Cobalt
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WOS记录号	WOS:000231361100013
引用统计	被引频次：34[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/321006/35106
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. H. Wei,S. Y. Wu,H. N. Dong. Investigations of the defect structure for Cu2+ in SrLaAlO4[J]. Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences,2005,60(7):541-544.
APA	W. H. Wei,S. Y. Wu,&H. N. Dong.(2005).Investigations of the defect structure for Cu2+ in SrLaAlO4.Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences,60(7),541-544.
MLA	W. H. Wei,et al."Investigations of the defect structure for Cu2+ in SrLaAlO4".Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences 60.7(2005):541-544.