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The Fe K-edge X-ray absorption study of the local structure of BaFe0.5Nb0.5O3
Shuvaeva V.A.1; Raevski I.P.1; Polozhentsev O.E.1; Zubavichus Y.V.3; Vlasenko V.G.1; Raevskaya S.I.1; Chen H.2
2017-06-01
Source PublicationMaterials Chemistry and Physics
ISSN02540584
Volume193Pages:260-266
AbstractThe Fe K-edge X-ray absorption fine structure (XAFS) spectra of BaFeNbO were analyzed together with those of FeO and CaFeSbO, 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 BaFeNbO 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 Å. The results show that BaFeNbO possesses quite substantial local dipole moments, which may have an impact on its dielectric properties.
KeywordElectronic materials Local structure Multiferroics XAFS
DOI10.1016/j.matchemphys.2017.02.026
URLView the original
Language英語
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Cited Times [WOS]:5   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Southern Federal University
2.Universidade de Macau
3.National Research Centre "Kurchatov Institute"
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GB/T 7714
Shuvaeva V.A.,Raevski I.P.,Polozhentsev O.E.,et al. The Fe K-edge 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 Y.V..,Vlasenko V.G..,...&Chen H..(2017).The Fe K-edge 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 K-edge X-ray absorption study of the local structure of BaFe0.5Nb0.5O3".Materials Chemistry and Physics 193(2017):260-266.
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