Theoretical investigations of the g factors and the local structures for the orthorhombic Nd3+ centers in the garnets

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	Theoretical investigations of the g factors and the local structures for the orthorhombic Nd3+ centers in the garnets
	S. Y. Wu ; H. N. Dong
刊名	Journal of Alloys and Compounds
	2005
卷号	393 期号:1-2 页码:46-50
关键词	electron paramagnetic resonance (EPR) defect structure crystal-field and spin hamiltonians Nd3+ garnets crystal-field substituted garnets superposition-model magnetic-properties neodymium laser parameters calcium cerium ion
ISSN号	0925-8388
中文摘要	The EPR g factors g(x), g(y) and g(z) and the local structures for the orthorhombic Nd3+ centers in YAG, YGG and LuGG garnets are studied by using the perturbation formulas of the g factors for a 43 ion in orthorhombic symmetry. In these formulas, the contributions to the g factors arising from the second-order perturbation terms and the admixture of various energy levels are considered. Based on the analyses of the g factors, we find that the polar angles theta'(j) of the impurity-ligand bonds related to the Z-axis of the crystals in these Nd3+ centers are smaller than the host angles theta(j) in pure crystals, whereas the azimuthal angles phi'(j) related to the X-axis in the impurity centers are larger than the corresponding phi(j) in the hosts. The calculated g factors, particularly their anisotropies Delta g [= g(z) - (g(x) + g(y))/2] and delta g (= g(x) - g(y)) for Nd3+ in the gamets based on the above local angles show reasonable agreement with the observed values. (c) 2004 Elsevier B.V. All rights reserved.
原文出处	://WOS:000228716700010
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35123]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Wu,H. N. Dong. Theoretical investigations of the g factors and the local structures for the orthorhombic Nd3+ centers in the garnets[J]. Journal of Alloys and Compounds,2005,393(1-2):46-50.
APA	S. Y. Wu,&H. N. Dong.(2005).Theoretical investigations of the g factors and the local structures for the orthorhombic Nd3+ centers in the garnets.Journal of Alloys and Compounds,393(1-2),46-50.
MLA	S. Y. Wu,et al."Theoretical investigations of the g factors and the local structures for the orthorhombic Nd3+ centers in the garnets".Journal of Alloys and Compounds 393.1-2(2005):46-50.