Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Magnetic susceptibility, EPR, NEXAFS and XPS spectra of Fe-doped CaBi2Nb2O9. / Zhuk, N. A.; Lutoev, V. P.; Makeev, B. A.; Nekipelov, S. V.; Koroleva, A. V.; Fedorova, A. V.; Yermolina, M. V.; Beznosikov, D. S.; Karlova, L. O.
в: Journal of Materials Research and Technology, Том 9, № 3, 06.2020, стр. 4173-4182.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Magnetic susceptibility, EPR, NEXAFS and XPS spectra of Fe-doped CaBi2Nb2O9
AU - Zhuk, N. A.
AU - Lutoev, V. P.
AU - Makeev, B. A.
AU - Nekipelov, S. V.
AU - Koroleva, A. V.
AU - Fedorova, A. V.
AU - Yermolina, M. V.
AU - Beznosikov, D. S.
AU - Karlova, L. O.
PY - 2020/6
Y1 - 2020/6
N2 - In order to study the electronic state of Fe atoms and interatomic exchange interac-tions in solid solutions of Bi2CaNb2-2xFe2xO9-δwith perovskite structure, methods ofmagnetic dilution, NEXAFS, XPS and EPR spectroscopy were used. Increased values ofthe magnetic moment of iron atoms in solid solutions compared to pure spin valuesfor Fe(III) are explained by the presence of clusters of Fe(III) atoms predominantly withantiferromagnetic type of exchange. Exchange parameters and cluster distribution inBi2CaNb2-2xFe2xO9-δsolid solutions depending on the Fe content were calculated accordingto the Heisenberg-Dirac-van Vleck model. The effect of calcium atoms on the clusterizationdegree and intensity of Fe interatomic exchange interactions was displayed. XPS spectraof Bi2CaNb2-2xFe2xO9-δ, were identified to enable estimation of the effective charge of theatoms composing it. The analysis of the NEXAFS Fe2p-spectra of iron oxides and the iron-containing solid solutions revealed that Fe atoms were mainly in an oxidation state of +3.EPR spectra of Fe containing solid solution powder show an intense asymmetric line in thelow-field part of the spectra at g = 4.27 with weakly manifested shoulder g 8-10 and a broadcomponent in the g 2 range with a high-field wing.
AB - In order to study the electronic state of Fe atoms and interatomic exchange interac-tions in solid solutions of Bi2CaNb2-2xFe2xO9-δwith perovskite structure, methods ofmagnetic dilution, NEXAFS, XPS and EPR spectroscopy were used. Increased values ofthe magnetic moment of iron atoms in solid solutions compared to pure spin valuesfor Fe(III) are explained by the presence of clusters of Fe(III) atoms predominantly withantiferromagnetic type of exchange. Exchange parameters and cluster distribution inBi2CaNb2-2xFe2xO9-δsolid solutions depending on the Fe content were calculated accordingto the Heisenberg-Dirac-van Vleck model. The effect of calcium atoms on the clusterizationdegree and intensity of Fe interatomic exchange interactions was displayed. XPS spectraof Bi2CaNb2-2xFe2xO9-δ, were identified to enable estimation of the effective charge of theatoms composing it. The analysis of the NEXAFS Fe2p-spectra of iron oxides and the iron-containing solid solutions revealed that Fe atoms were mainly in an oxidation state of +3.EPR spectra of Fe containing solid solution powder show an intense asymmetric line in thelow-field part of the spectra at g = 4.27 with weakly manifested shoulder g 8-10 and a broadcomponent in the g 2 range with a high-field wing.
KW - Aurivillius phases
KW - Ferroelectric
KW - Magnetic susceptibility
KW - Spectroscopy
KW - THIN-FILMS
KW - ELECTRICAL-PROPERTIES
KW - FERROELECTRIC AURIVILLIUS PHASES
KW - PIEZOELECTRIC PROPERTIES
KW - CATION DISORDER
KW - BARIUM
KW - CA
KW - MICROSTRUCTURE
KW - SR
KW - BA
UR - http://www.scopus.com/inward/record.url?scp=85081580418&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/6a3ff0a6-4100-38a9-9dcb-3ff8a880cee7/
U2 - 10.1016/j.jmrt.2020.02.044
DO - 10.1016/j.jmrt.2020.02.044
M3 - Article
AN - SCOPUS:85081580418
VL - 9
SP - 4173
EP - 4182
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
SN - 2238-7854
IS - 3
ER -
ID: 53727179