Thermochemistry of La0.7Sr0.3Mn1-xFe xO3 solid solutions (0<x<1)

Nihan Kemik, Yayoi Takamura, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The structure, the energetics and the internal redox reactions of La 0.7Sr0.3FexMn1-xO3 have been studied in the complete solid solution range 0.0<x<1.0. High temperature oxide melt drop solution calorimetry was performed to determine the enthalpies of formation from binary oxides and the enthalpy of mixing. There is a noticeable change in the energetics of the solid solution near x=0.7, which is due to the growing concentration of Fe4+ at higher Fe/(Fe+Mn) ratio. The balance between different valences of the transition metals, Mn and Fe, is the main factor in determining the energetics of the La0.70Sr 0.30FexMn1-xO3 solid solution. Published by Elsevier Inc.

Original languageEnglish (US)
Pages (from-to)2118-2123
Number of pages6
JournalJournal of Solid State Chemistry
Volume184
Issue number8
DOIs
StatePublished - Aug 2011
Externally publishedYes

Keywords

  • (La,Sr)FeO
  • (La,Sr)MnO
  • Calorimetry
  • Perovskite
  • Thermodynamics
  • Transition metal oxide

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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