Investigations of the EPR parameters and local structures for the substitutional Cu2+ centers in the tungstates

doi:10.1051/epjap/2010052

IMR OpenIR

	Investigations of the EPR parameters and local structures for the substitutional Cu2+ centers in the tungstates
	Zhang, H. -M.1; Wu, S. -Y.1,2; Xu, P.1; Li, L. -L.1; Zhang, S. -X.1
通讯作者	Zhang, H. -M.()
	2010-06-01
发表期刊	EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
ISSN	1286-0042
卷号	50 期号:3 页码:6
摘要	The high order perturbation formulas of the electron paramagnetic resonance (EPR) parameters (the g factors and the hyperfine structure constants) are established for a 3d(9) ion in orthorhombically compressed octahedra. These formulas are applied to the investigations of the EPR spectra and local structures for the substitutional Cu2+ centers in the wolframite-type tungstates AWO(4) (where A = Cd, Zn, Mg). Based on the studies, the [CuO6](10-) clusters are found to experience the local planar bond length variations delta R' (approximate to 0.096, 0.021 and 0.028 angstrom for CdWO4, ZnWO4 and MgWO4, respectively) along X and Y-axes. These values are quite different from the host planar bond length variations delta R (approximate to 0.013, 0.069 and 0.005 angstrom) for the A(2+) sites in the pure tungstates. The above local bond length variations in the impurity centers can be attributed to the Jahn-Teller effect and size mismatching substitution. The theoretical EPR parameters based on the above local structures agree well with the experimental data. By adopting the uniform theoretical formulas and fewer adjustable parameters in this work, the improvements are achieved for the EPR parameters as compared with the previous calculation results.
资助者	Academic Excellence of UESTC
DOI	10.1051/epjap/2010052
收录类别	SCI
语种	英语
资助项目	Academic Excellence of UESTC
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000277727700011
出版者	CAMBRIDGE UNIV PRESS
引用统计	被引频次：8[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/321006/100582
专题	中国科学院金属研究所
通讯作者	Zhang, H. -M.
作者单位	1.Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, H. -M.,Wu, S. -Y.,Xu, P.,et al. Investigations of the EPR parameters and local structures for the substitutional Cu2+ centers in the tungstates[J]. EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS,2010,50(3):6.
APA	Zhang, H. -M.,Wu, S. -Y.,Xu, P.,Li, L. -L.,&Zhang, S. -X..(2010).Investigations of the EPR parameters and local structures for the substitutional Cu2+ centers in the tungstates.EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS,50(3),6.
MLA	Zhang, H. -M.,et al."Investigations of the EPR parameters and local structures for the substitutional Cu2+ centers in the tungstates".EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS 50.3(2010):6.