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

^*Korresponderande författare för detta arbete

Fysik

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

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Sammanfattning

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⁺.

Originalspråk	Engelska
Sidor (från-till)	2925-2927
Antal sidor	3
Tidskrift	Applied Physics Letters
Volym	76
Nummer	20
DOI	https://doi.org/10.1063/1.126518
Status	Publicerad - 15 maj 2000
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

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10.1063/1.126518

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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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