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

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

*Korresponderande författare för detta arbete

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191 Citeringar (Scopus)

Sammanfattning

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+.

OriginalspråkEngelska
Sidor (från-till)2925-2927
Antal sidor3
TidskriftApplied Physics Letters
Volym76
Utgåva20
DOI
StatusPublicerad - 15 maj 2000
MoE-publikationstypA1 Tidskriftsartikel-refererad

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