Evidence for valence fluctuation of Fe in Sr2FeMoO6-w double perovskite

J. Lindén, T. Yamamoto, M. Karppinen, H. Yamauchi*, T. Pietari

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

191 Citations (Scopus)

Abstract

In this letter evidence for the formation of a valence-fluctuation state of iron, formally denoted as Fe2.5+, is presented. The system under study is the Sr2FeMoO6-w double perovskite, known for exhibiting a very large magnetoresistance. Samples of Sr2FeMoO6-w were synthesized by means of an encapsulation technique utilizing an Fe getter technique and characterized by 57Fe Mössbauer spectroscopy. From 5 K to room temperature the Mössbauer spectrum is dominated by a component with hyperfine parameter values between those expected for high-spin Fe3+ and high-spin Fe2+.

Original languageEnglish
Pages (from-to)2925-2927
Number of pages3
JournalApplied Physics Letters
Volume76
Issue number20
DOIs
Publication statusPublished - 15 May 2000
MoE publication typeA1 Journal article-refereed

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