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

L. J. Gillie, A. J. Wright, J. Hadermann, G. Van Tendeloo, C. Greaves

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The oxygen-deficient Ruddlesden-Popper (RP) phase Sr3Mn 2O6 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 Sr3Mn 2O6 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 ∼250K 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.

Original languageEnglish
Pages (from-to)188-196
Number of pages9
JournalJournal of Solid State Chemistry
Volume175
Issue number2
Early online date14 Aug 2003
DOIs
Publication statusPublished - Nov 2003
Externally publishedYes

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