Fe-57 Mossbauer spectroscopy investigation of the Fe-II/III mixed-valence state and the B-site order in double perovskite A(2)FeMoO(6)

J Linden*, H Yamauchi, M Karppinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

B-site ordered double-perovskite samples A FeMoO6, with A = Ca, Sr or Ba were synthesized in a reducing atmosphere using an encapsulation technique. The samples were characterized by Fe-57 Mossbauer spectroscopy. The valence of Fe was found to be in an intermediate II/III state, being close to the midpoint for A = Sr and slightly shifted towards 11 for Ba. The degree of B-site ordering was found to be more than 95%. Using various synthesis temperatures the ordering could be tuned. Fe atoms replacing Mo at the antisite and adjacent to it were identified in the Mossbauer data. Presence of antiphase boundaries was also seen. (C) 2003 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)843-844
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume272
DOIs
Publication statusPublished - May 2004
MoE publication typeA1 Journal article-refereed
EventInternational Conference on Magnetism - Rome, Italy
Duration: 27 Jul 20031 Aug 2003

Keywords

  • Mossbauer
  • valence mixing
  • halfmetal
  • double perovskite

Cite this