Dissipation in granular high-temperature superconductors

A.D. Caplin, S.S. Bungre, S.M. Cassidy, J.R. Laverty and Z.X. Shen

Physica A: Statistical Mechanics and its Applications, 1990, vol. 168, issue 1, 268-276

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.

Date: 1990
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:168:y:1990:i:1:p:268-276

DOI: 10.1016/0378-4371(90)90377-5

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