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Effects of disorder on the superconducting properties of BaFe1.8Co0.2As2 single crystals

Single crystals of superconducting BaFe1.8Co0.2As2 were exposed to neutron irradiation in a fission reactor. The defects introduced decrease the superconducting transition temperature (by about 0.3 K) and the upper critical field anisotropy (e.g. from 2.8 to 2.5 at 22 K) and enhance the critical cur...

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Bibliographic Details
Published in:Superconductor science & technology 2009-09, Vol.22 (9), p.095011-095011 (4)
Main Authors: Eisterer, M, Zehetmayer, M, Weber, H W, Jiang, J, Weiss, J D, Yamamoto, A, Hellstrom, E E
Format: Article
Language:English
Online Access:Get full text
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Summary:Single crystals of superconducting BaFe1.8Co0.2As2 were exposed to neutron irradiation in a fission reactor. The defects introduced decrease the superconducting transition temperature (by about 0.3 K) and the upper critical field anisotropy (e.g. from 2.8 to 2.5 at 22 K) and enhance the critical current densities by a factor of up to about 3. These changes are discussed in the context of similar experiments on other superconducting materials.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/22/9/095011