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

J. Lindén; T. Yamamoto; M. Karppinen; H. Yamauchi; T. Pietari

doi:10.1063/1.126518

Evidence for valence fluctuation of Fe in Sr₂FeMoO_6-w double perovskite

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

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › Scientific › peer-review

193 Citations (Scopus)

Abstract

In this letter evidence for the formation of a valence-fluctuation state of iron, formally denoted as Fe^2.5+, is presented. The system under study is the Sr₂FeMoO_6-w double perovskite, known for exhibiting a very large magnetoresistance. Samples of Sr₂FeMoO_6-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 language	English
Pages (from-to)	2925-2927
Number of pages	3
Journal	Applied Physics Letters
Volume	76
Issue number	20
DOIs	https://doi.org/10.1063/1.126518
Publication status	Published - 15 May 2000
MoE publication type	A1 Journal article-refereed

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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 M{\"o}ssbauer spectroscopy. From 5 K to room temperature the M{\"o}ssbauer spectrum is dominated by a component with hyperfine parameter values between those expected for high-spin Fe3+ and high-spin Fe2+.",

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T1 - Evidence for valence fluctuation of Fe in Sr2FeMoO6-w double perovskite

AU - Lindén, J.

AU - Yamamoto, T.

AU - Karppinen, M.

AU - Yamauchi, H.

AU - Pietari, T.

PY - 2000/5/15

Y1 - 2000/5/15

N2 - 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+.

AB - 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+.

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DO - 10.1063/1.126518

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SP - 2925

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

ER -

Evidence for valence fluctuation of Fe in Sr₂FeMoO_6-w double perovskite

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