Issue 7, 2019

The effect of manganese oxidation state on antiferromagnetic order in SrMn1−xSbxO3 (0 < x < 0.5) perovskite solid solutions

Abstract

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 Néel 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.

Graphical abstract: The effect of manganese oxidation state on antiferromagnetic order in SrMn1−xSbxO3 (0 < x < 0.5) perovskite solid solutions

Supplementary files

Article information

Article type
Paper
Submitted
13 Nov 2018
Accepted
16 Jan 2019
First published
17 Jan 2019
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2019,7, 2085-2095

The effect of manganese oxidation state on antiferromagnetic order in SrMn1−xSbxO3 (0 < x < 0.5) perovskite solid solutions

G. V. Bazuev, A. P. Tyutyunnik, A. V. Korolev, E. Suard, C. Tai and N. V. Tarakina, J. Mater. Chem. C, 2019, 7, 2085 DOI: 10.1039/C8TC05717F

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