UM
The Fe Kedge X-ray absorption study of the local structure of BaFe0.5Nb0.5O3
Shuvaeva, V. A.; Raevski, I. P.; Polozhentsev, O. E.; Zubavichus, Ya. V.; Vlasenko, V. G.; Raevskaya, S. I.; Chen, H.
2017-06
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume193Pages:260-266
AbstractThe Fe IC edge X-ray absorption fine structure (XAFS) spectra of BaFe0.5Nb0.5O3 were analyzed together with those of Fe2O3 and CaFe0.5Sb0.5O3, which were used as reference compounds. Both X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) have been employed to obtain quantitative structural information on the Fe local environment. A substantial pre-edge peak at the absorption spectra of BaFe0.5Nb0.5O3 shows that the symmetry of the structure is not cubic on the local scale due to Fe displacement off the center of the oxygen octahedron. The values of Fe -O distances were refined by a nonlinear least-square fit to the EXAFS data, and the Fe off-center displacement was estimated to be about 0.12 angstrom. The results show that BaFe0.5Nb0.5O3 possesses quite substantial local dipole moments, which may have an impact on its dielectric properties. (C) 2017 Elsevier B.V. All rights reserved.
KeywordElectronic materials XAFS Local structure Multiferroics
DOI10.1016/j.matchemphys.2017.02.026
URLView the original
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000399258400032
PublisherELSEVIER SCIENCE SA
The Source to ArticleWOS
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
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Shuvaeva, V. A.,Raevski, I. P.,Polozhentsev, O. E.,et al. The Fe Kedge X-ray absorption study of the local structure of BaFe0.5Nb0.5O3[J]. MATERIALS CHEMISTRY AND PHYSICS,2017,193:260-266.
APA Shuvaeva, V. A..,Raevski, I. P..,Polozhentsev, O. E..,Zubavichus, Ya. V..,Vlasenko, V. G..,...&Chen, H..(2017).The Fe Kedge X-ray absorption study of the local structure of BaFe0.5Nb0.5O3.MATERIALS CHEMISTRY AND PHYSICS,193,260-266.
MLA Shuvaeva, V. A.,et al."The Fe Kedge X-ray absorption study of the local structure of BaFe0.5Nb0.5O3".MATERIALS CHEMISTRY AND PHYSICS 193(2017):260-266.
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