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Synthesis and characterization of the reduced double-layer manganite Sr3Mn2O6+x

Gillie, Lisa .J., Wright, A.J., Hadermann, J., Van Tendeloo, G. and Greaves, C. (2003) Synthesis and characterization of the reduced double-layer manganite Sr3Mn2O6+x. Journal of Solid State Chemistry, 175 (2). pp. 188-196. ISSN 00224596

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Abstract

The oxygen-deficient Ruddlesden–Popper (RP) phase Sr3Mn2O6 crystallizes with an ordered array of oxygen vacancies to afford a structure in which the Mn3+ ions exist in a square-pyramidal environment. The MnO5 polyhedra are linked through their corners to form a structure that is related to that observed for the single-layered material, Sr2MnO3.5. The nuclear and magnetic structures of a polycrystalline sample of Sr3Mn2O6 have been determined using Rietveld analysis of neutron powder diffraction data and electron diffraction techniques. The pure Mn3+ double-layered phase crystallizes in a superstructure of the simple RP subcell: tetragonal, P4/mbm, a=10.8686(2) Å and c=20.2051(3) Å.

Magnetic susceptibility studies suggest a transition at 250 K to a canted antiferromagnetic ordered structure. The magnetic unit-cell consists of ferromagnetic clusters of corner-sharing MnO5 units, which are antiferromagnetically aligned to other clusters within the layers.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Schools: School of Applied Sciences
School of Applied Sciences > Materials and Catalysis Research Centre
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Depositing User: Graham Stone
Date Deposited: 05 May 2009 16:40
Last Modified: 22 Sep 2010 12:39
URI: http://eprints.hud.ac.uk/id/eprint/4171

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