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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
Corresponding AuthorZhang, H. -M.()
2010-06-01
Source PublicationEUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
ISSN1286-0042
Volume50Issue:3Pages:6
AbstractThe 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.
Funding OrganizationAcademic Excellence of UESTC
DOI10.1051/epjap/2010052
Indexed BySCI
Language英语
Funding ProjectAcademic Excellence of UESTC
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000277727700011
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/100582
Collection中国科学院金属研究所
Corresponding AuthorZhang, H. -M.
Affiliation1.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
Recommended Citation
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.
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