High-temperature neutron diffraction study of the cation ordered perovskites TbBaMn2O5+x and TbBaMn2O5.(5-y)

Elizabeth Castillo-Martinez, Anthony J. Williams, J. Paul Attfield

Research output: Contribution to journalArticlepeer-review

Abstract

The miscibility of TbBaMn2O5+x, and TbBaMn2O5.5-y, has been investigated at 100-600 degrees C using in situ powder neutron diffraction. No miscibility is observed, and the two phases remain oxygen stoichiometric (x, y = 0) at 600 degrees C. Structure refinement results show that neither material undergoes a phase transition in this temperature range. TbBaMn2O5 is Mn2+/Mn3+ charge ordered and any charge melting transition is > 600 degrees C. This symmetry-broken charge ordering is remarkably robust in comparison to that in other oxides. (c) 2006 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)3505-3510
Number of pages6
JournalJournal of Solid State Chemistry
Volume179
Issue number11
DOIs
Publication statusPublished - Nov 2006

Keywords / Materials (for Non-textual outputs)

  • neutron diffraction
  • MAGNETIC-STRUCTURE
  • CRYSTAL

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