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Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe1−x


Khasanov, R; Bendele, M; Conder, K; Keller, H; Pomjakushina, E; Pomjakushin, V (2010). Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe1−x. New Journal of Physics, 12(7):073024.

Abstract

The Fe isotope effect (Fe-IE) on the transition temperature Tc and the crystal structure was studied in the Fe chalcogenide superconductor FeSe1−x by means of magnetization and neutron powder diffraction (NPD). The substitution of natural Fe (containing sime92% of 56Fe) by its lighter 54Fe isotope leads to a shift in Tc of 0.22(5) K corresponding to an Fe-IE exponent of αFe=0.81(15). Simultaneously, a small structural change with isotope substitution is observed by NPD, which may contribute to the total Fe isotope shift of Tc.

Abstract

The Fe isotope effect (Fe-IE) on the transition temperature Tc and the crystal structure was studied in the Fe chalcogenide superconductor FeSe1−x by means of magnetization and neutron powder diffraction (NPD). The substitution of natural Fe (containing sime92% of 56Fe) by its lighter 54Fe isotope leads to a shift in Tc of 0.22(5) K corresponding to an Fe-IE exponent of αFe=0.81(15). Simultaneously, a small structural change with isotope substitution is observed by NPD, which may contribute to the total Fe isotope shift of Tc.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2010
Deposited On:13 Feb 2011 18:22
Last Modified:17 Feb 2018 18:37
Publisher:Institute of Physics Publishing
ISSN:1367-2630
OA Status:Gold
Publisher DOI:https://doi.org/10.1088/1367-2630/12/7/073024
Related URLs:http://arxiv.org/abs/1002.2510

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