Research output: Contribution to journal › Article › peer-review
Magnetic behavior of Fe-doped of multicomponent bismuth niobate pyrochlore. / Zhuk, Nadezhda A.; Makeev, Boris A.; Nekipelov, Sergey V.; Yermolina, Maria V.; Fedorova, Anna V.; Chernykh, Galina I.
In: Reviews on Advanced Materials Science, Vol. 60, No. 1, 01.01.2021, p. 38-46.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Magnetic behavior of Fe-doped of multicomponent bismuth niobate pyrochlore
AU - Zhuk, Nadezhda A.
AU - Makeev, Boris A.
AU - Nekipelov, Sergey V.
AU - Yermolina, Maria V.
AU - Fedorova, Anna V.
AU - Chernykh, Galina I.
N1 - Publisher Copyright: © 2021 Nadezhda A. Zhuk et al., published by De Gruyter 2021. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - Two series of iron-containing solid solutions Bi2Mg1-xFexNb2O9+δ and Bi2MgNb2-2xFe2xO9-δ of pyrochlore structure were obtained by the traditional solid phase synthesis method. The electronic state and character of exchange interactions of iron atoms in solid solutions were investigated by methods of magnetic dilution and NEXAFS-spectroscopy. According to X-ray spectroscopy and magnetic susceptibility data, iron(III) atoms are distributed mainly in octahedral positions of niobium(V) and in a dominant amount are in the charge state of Fe(III) in the form of monomers and exchange-bonded clusters mainly with antiferromagnetic type of exchange. Differences in magnetic behavior of iron-containing solid solutions of both series have been revealed. Antiferromagnetic and ferromagnetic exchange can be realized between iron atoms, which, with increasing concentration of paramagnetic atoms and averaging structure distortions, becomes less significant. The parameters of exchange interactions in clusters and distribution of iron paramagnetic atoms depending on the concentration of solid solutions have been calculated.
AB - Two series of iron-containing solid solutions Bi2Mg1-xFexNb2O9+δ and Bi2MgNb2-2xFe2xO9-δ of pyrochlore structure were obtained by the traditional solid phase synthesis method. The electronic state and character of exchange interactions of iron atoms in solid solutions were investigated by methods of magnetic dilution and NEXAFS-spectroscopy. According to X-ray spectroscopy and magnetic susceptibility data, iron(III) atoms are distributed mainly in octahedral positions of niobium(V) and in a dominant amount are in the charge state of Fe(III) in the form of monomers and exchange-bonded clusters mainly with antiferromagnetic type of exchange. Differences in magnetic behavior of iron-containing solid solutions of both series have been revealed. Antiferromagnetic and ferromagnetic exchange can be realized between iron atoms, which, with increasing concentration of paramagnetic atoms and averaging structure distortions, becomes less significant. The parameters of exchange interactions in clusters and distribution of iron paramagnetic atoms depending on the concentration of solid solutions have been calculated.
KW - iron
KW - magnetic susceptibility
KW - NEXAFS
KW - pyrochlore structural type
KW - solid solutions
KW - SYSTEM
KW - EPR
KW - ELECTRICAL-PROPERTIES
KW - OPTICAL-PROPERTIES
KW - PHASE-EQUILIBRIA
KW - DIELECTRIC-PROPERTIES
KW - NANOCOMPOSITE
KW - CERAMICS
UR - http://www.scopus.com/inward/record.url?scp=85100602612&partnerID=8YFLogxK
U2 - 10.1515/rams-2021-0011
DO - 10.1515/rams-2021-0011
M3 - Article
AN - SCOPUS:85100602612
VL - 60
SP - 38
EP - 46
JO - Reviews on Advanced Materials Science
JF - Reviews on Advanced Materials Science
SN - 1606-5131
IS - 1
ER -
ID: 74887251