Structural and electronic phase transitions in Sr1-xCe xMnO3 perovskites

Brendan J. Kennedy, Paul J. Saines, Qingdi Zhou, Zhaoming Zhang, Motohide Matsuda, Michihiro Miyake

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The structures of eight members of the series Sr1-xCe xMnO3 with 0.075≤x≤0.4 have been established using synchrotron X-ray powder diffraction. These exhibit the sequence of structures cubic/Pm3̄m x≈0.08/→ tetragonal/14/mcm x≈0.35/rarr; orthorhombic/Imma with increasing Ce content. Unusual peak broadening due to domainwall scattering is observed near the composition-induced first-order cubic-tetragonal transition. The temperature dependence of the structures for three examples x = 0.1, 0.2 and 0.35 is described. For the x = 0.1 and 0.35 samples evidence for a first-order loss of the orbital ordering associated with a cooperative Jahn-Teller distortion is presented. The onset of the orbitally disordered state is accompanied by a discontinuous reduction in cell volume.

Original languageEnglish
Pages (from-to)2639-2645
Number of pages7
JournalJournal of Solid State Chemistry
Volume181
Issue number10
DOIs
Publication statusPublished - Oct 2008

Keywords

  • Jahn-Teller effect
  • Manganese oxide
  • Perovskite
  • Phase transition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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    Kennedy, B. J., Saines, P. J., Zhou, Q., Zhang, Z., Matsuda, M., & Miyake, M. (2008). Structural and electronic phase transitions in Sr1-xCe xMnO3 perovskites. Journal of Solid State Chemistry, 181(10), 2639-2645. https://doi.org/10.1016/j.jssc.2008.06.022