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Dissipation in granular high-temperature superconductors

Author

Listed:
  • Caplin, A.D.
  • Bungre, S.S.
  • Cassidy, S.M.
  • Laverty, J.R.
  • Shen, Z.X.

Abstract

The current-voltage characteristics of bulk-sintered YBa2Cu3O7 have been studied in detail. The onset of dissipation indicates that an intergranular critical current can be defined. The magnitudes of the resistance of a single grain boundary and of its critical current are estimated. These estimates lead to values of the rnic(0) product for the intergranular weak-links that are of the order of 100 μV, well within the wide range of rnic(0) product measured on bi-crystal grain boundaries by Dimos et al., but two to three orders of magnitude less than that expected from “classical” models of superconducting weak-links.

Suggested Citation

  • Caplin, A.D. & Bungre, S.S. & Cassidy, S.M. & Laverty, J.R. & Shen, Z.X., 1990. "Dissipation in granular high-temperature superconductors," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 168(1), pages 268-276.
    • Handle: RePEc:eee:phsmap:v:168:y:1990:i:1:p:268-276
    DOI: 10.1016/0378-4371(90)90377-5
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    1. Mannhart, J. & Huebener, R.P. & Kober, F. & Koelle, D. & Chaudhari, P. & Dimos, D. & Gross, R. & Gupta, A. & Koren, G. & Tsuei, C.C., 1990. "Current transport across grain boundary networks in high-Tc superconductors," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 168(1), pages 345-352.
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