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The effect of manganese oxidation state on antiferromagnetic order in SrMn1-xSbxO3 (0 < x < 0.5) perovskite solid solutions
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Number of Authors: 62019 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 7, no 7, p. 2085-2095Article in journal (Refereed) Published
Abstract [en]

The mixed-valence manganese (Mn3+/Mn4+) solid solution, SrMn1-xSbxO3, was prepared for the first time. Two ranges of solid solutions were found: (1) SrMn1-xSbxO3 (0.025 x 0.09) with monoclinically distorted 6H-SrMnO3 polytype (sp. gr. C/2c) and (2) SrMn1-xSbxO3 (0.17 x 0.50) with a tetragonal unit cell (sp. gr. I4/mcm). Crystal structure refinement using X-ray and neutron powder diffraction data showed that the structure of the monoclinic solid solution consists of corner-sharing octahedra around sites occupied by manganese and antimony ions and face-sharing octahedra around sites occupied by manganese ions only, while the tetragonal solid solution has a random distribution of B-site cations. The presence of long-range antiferromagnetic order with a Neel temperature of about 148 K for SrMn0.80Sb0.20O3 and about 280 K for SrMn0.925Sb0.075O3 was found from the results of DC and AC susceptibility and neutron diffraction experiments at 5 K and 80 K.

Place, publisher, year, edition, pages
2019. Vol. 7, no 7, p. 2085-2095
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Materials Engineering Chemical Sciences
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URN: urn:nbn:se:su:diva-167513DOI: 10.1039/c8tc05717fISI: 000459725400028OAI: oai:DiVA.org:su-167513DiVA, id: diva2:1305984
Available from: 2019-04-21 Created: 2019-04-21 Last updated: 2019-04-21Bibliographically approved

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Tyutyunnik, Alexander P.Korolev, Alexander V.Tai, Cheuk-Wai
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Department of Materials and Environmental Chemistry (MMK)
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