Evidence for valence fluctuation of Fe in Sr[sub 2]FeMoO[sub 6-w] double perovskite

Lindén, J.; Yamamoto, T.; Karppinen, Maarit; Yamauchi, H.; Pietari, T.

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Evidence for valence fluctuation of Fe in Sr[sub 2]FeMoO[sub 6-w] double perovskite

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Title:	Evidence for valence fluctuation of Fe in Sr[sub 2]FeMoO[sub 6-w] double perovskite
Author(s):	Lindén, J. ; Yamamoto, T. ; Karppinen, Maarit ; Yamauchi, H. ; Pietari, T.
Date:	2000
Language:	en
Pages:	2925-2927
Department:	Kemian laitos Department of Chemistry
Series:	Applied Physics Letters, Volume 76, Issue 20
ISSN:	0003-6951 (printed)
DOI-number:	10.1063/1.126518
Subject:	Chemistry, Physics
Keywords:	dielectric oxides, magnetoresistance, iron
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Citation: Lindén, J. & Yamamoto, T. & Karppinen, Maarit & Yamauchi, H. & Pietari, T. 2000. Evidence for valence fluctuation of Fe in Sr[sub 2]FeMoO[sub 6-w] double perovskite. Applied Physics Letters. Volume 76, Issue 20. 2925-2927. ISSN 0003-6951 (printed). DOI: 10.1063/1.126518.
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+.
Rights: © 2000 AIP Publishing. This is the accepted version of the following article: Lindén, J. & Yamamoto, T. & Karppinen, Maarit & Yamauchi, H. & Pietari, T. 2000. Evidence for valence fluctuation of Fe in Sr[sub 2]FeMoO[sub 6-w] double perovskite. Applied Physics Letters. Volume 76, Issue 20. 2925-2927. ISSN 0003-6951 (printed). DOI: 10.1063/1.126518, which has been published in final form at http://scitation.aip.org/content/aip/journal/apl/76/20/10.1063/1.126518.
Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-201510134599 Email this Export to RefWorks QR Code Print BibTex Tweet

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