TITLE

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

AUTHOR(S)
Lee, S.; Jiang, J.; Weiss, J. D.; Folkman, C. M.; Bark, C. W.; Tarantini, C.; Xu, A.; Abraimov, D.; Polyanskii, A.; Nelson, C. T.; Zhang, Y.; Baek, S. H.; Jang, H. W.; Yamamoto, A.; Kametani, F.; Pan, X. Q.; Hellstrom, E. E.; Gurevich, A.; Eom, C. B.; Larbalestier, D. C.
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/23/2009, Vol. 95 Issue 21, p212505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
45478092

 

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