Weak-link behavior of grain boundaries in superconducting Ba (Fe 1-xCox)2As2 bicrystals

S. Lee; J. Jiang; J. D. Weiss; C. M. Folkman; C. W. Bark; C. Tarantini; A. Xu; D. Abraimov; A. Polyanskii; C. T. Nelson; Y. Zhang; S. H. Baek; H. W. Jang; A. Yamamoto; F. Kametani; X. Q. Pan; E. E. Hellstrom; A. Gurevich; C. B. Eom; D. C. Larbalestier

doi:10.1063/1.3262953

Weak-link behavior of grain boundaries in superconducting Ba (Fe _1-xCo_x)₂As₂ bicrystals

S. Lee, J. Jiang, J. D. Weiss, C. M. Folkman, C. W. Bark, C. Tarantini, A. Xu, D. Abraimov, A. Polyanskii, C. T. Nelson, Y. Zhang, S. H. Baek, H. W. Jang, A. Yamamoto, F. Kametani, X. Q. Pan, E. E. Hellstrom, A. Gurevich, C. B. Eom, D. C. Larbalestier

electron Microscopy and Microanalysis

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171 Scopus citations

Abstract

We show that despite the low anisotropy, strong vortex pinning, and high irreversibility field Hirr close to the upper critical field H_c2 of Ba(Fe_1-xCo_x)₂As₂, the critical current density Jgb across [001] tilt grain boundaries (GBs) of thin film Ba(Fe_1-xCo_x)₂As₂ bicrystals is strongly depressed, similar to high-T_c 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.

Original language	English
Article number	212505
Journal	Applied Physics Letters
Volume	95
Issue number	21
DOIs	https://doi.org/10.1063/1.3262953
State	Published - 2009

Funding

We are grateful to John Fournelle, Marina Putti, and Pei Li for discussions and experimental help. Work at UW was supported by DOE grant DE-FG02-06ER463. Work at NHMFL was supported under NSF Cooperative Agreement No. DMR-0084173, by the State of Florida, and by AFOSR grant FA9550-06-1-0474. TEM work at the University of Michigan was supported by the Department of Energy under grant DE-FG02-07ER46416. A.Y. was supported by a fellowship of the Japan Society for the Promotion of Science.

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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. (2009). Weak-link behavior of grain boundaries in superconducting Ba (Fe _1-xCo_x)₂As₂ bicrystals. Applied Physics Letters, 95(21), Article 212505. https://doi.org/10.1063/1.3262953

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title = "Weak-link behavior of grain boundaries in superconducting Ba (Fe 1-xCox)2As2 bicrystals",

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.",

author = "S. Lee and J. Jiang and Weiss, {J. D.} and Folkman, {C. M.} and Bark, {C. W.} and C. Tarantini and A. Xu and D. Abraimov and A. Polyanskii and Nelson, {C. T.} and Y. Zhang and Baek, {S. H.} and Jang, {H. W.} and A. Yamamoto and F. Kametani and Pan, {X. Q.} and Hellstrom, {E. E.} and A. Gurevich and Eom, {C. B.} and Larbalestier, {D. C.}",

year = "2009",

doi = "10.1063/1.3262953",

language = "English",

volume = "95",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "21",

}

Lee, S, Jiang, J, Weiss, JD, Folkman, CM, Bark, CW, Tarantini, C, Xu, A, Abraimov, D, Polyanskii, A, Nelson, CT, Zhang, Y, Baek, SH, Jang, HW, Yamamoto, A, Kametani, F, Pan, XQ, Hellstrom, EE, Gurevich, A, Eom, CB & Larbalestier, DC 2009, 'Weak-link behavior of grain boundaries in superconducting Ba (Fe _1-xCo_x)₂As₂ bicrystals', Applied Physics Letters, vol. 95, no. 21, 212505. https://doi.org/10.1063/1.3262953

TY - JOUR

T1 - Weak-link behavior of grain boundaries in superconducting Ba (Fe 1-xCox)2As2 bicrystals

AU - Lee, S.

AU - Jiang, J.

AU - Weiss, J. D.

AU - Folkman, C. M.

AU - Bark, C. W.

AU - Tarantini, C.

AU - Xu, A.

AU - Abraimov, D.

AU - Polyanskii, A.

AU - Nelson, C. T.

AU - Zhang, Y.

AU - Baek, S. H.

AU - Jang, H. W.

AU - Yamamoto, A.

AU - Kametani, F.

AU - Pan, X. Q.

AU - Hellstrom, E. E.

AU - Gurevich, A.

AU - Eom, C. B.

AU - Larbalestier, D. C.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

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U2 - 10.1063/1.3262953

DO - 10.1063/1.3262953

M3 - Article

AN - SCOPUS:71549128399

SN - 0003-6951

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

M1 - 212505

ER -

Weak-link behavior of grain boundaries in superconducting Ba (Fe _1-xCo_x)₂As₂ bicrystals

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