Weak-link behavior of grain boundaries in superconducting Ba(Fe1-xCOx)2As2 bicrystals

Title
Weak-link behavior of grain boundaries in superconducting Ba(Fe1-xCOx)2As2 bicrystals
Authors
S. LeeJ. JiangJ. D. WeissC. M. FolkmanC. W. BarkC. TarantiniA. XuD. AbraimovA. PolyanskiiC. T. NelsonY. ZhangS. H. Baek장호원A. YamamotoF. KametaniX. Q. PanE. E. HellstromA. GurevichC. B. EomD. C. Larbalestier
Keywords
High Tc superconductors; Weak-link; Grain boundaries; Ba(Fe1− xCox)2As2; 2M24180; 2M24190; 2M24260
Issue Date
2009-11
Publisher
Applied physics letters
Citation
VOL 95, NO 21, 212505-1-212505-3
Abstract
We show that despite the low anisotropy, strong vortex pinning, and high irreversibility field Hirr close to the upper critical field Hc2 of Ba(Fe1−xCox)2As2, the critical current density Jgb across [001] tilt grain boundaries (GBs) of thin film Ba(Fe1−xCox)2As2 bicrystals is strongly depressed, similar to high-Tc cuprates. Our results suggest that weak-linked GBs are characteristic of both cuprates and pnictides because of competing orders, low carrier density, and unconventional pairing symmetry.
URI
http://pubs.kist.re.kr/handle/201004/36899
ISSN
0003-6951
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KIST Publication > Article
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