Evidence for valence fluctuation of Fe in Sr_(2)FeMoO_(6-w) double perovskite

J. Linden, T. Yamamoto, M. Karppinen, H. Yamauchi, T. Pietari

    Research output: Contribution to journalArticleScientificpeer-review

    193 Citations (Scopus)
    212 Downloads (Pure)


    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
    JournalApplied Physics Letters
    Issue number20
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed


    • superconductor


    Dive into the research topics of 'Evidence for valence fluctuation of Fe in Sr_(2)FeMoO_(6-w) double perovskite'. Together they form a unique fingerprint.

    Cite this