On the current transport limitations in Bi-based high temperature superconducting tapes

Authors

S. Tonies, Atomic Institute of the Austrian Universities, Austria
H. W. Weber, Atomic Institute of the Austrian Universities, Austria
Y. C. Guo, University of WollongongFollow
S. X. Dou, University of WollongongFollow
R. Sawh, University of Houston, USA
R. Weinstein, University of Houston, USA

RIS ID

6526

Publication Details

This article was originally published as: Tonies, S, Weber, HW, Guo, YC, Dou, SX, Sawh, R & Weinstein, R, On the current transport limitations in Bi-based high temperature superconducting tapes, Applied Physics Letters, 2001, 78(24), 3851–3853. Original journal available here.

Abstract

The transport critical current densities, Jc, of superconducting (Bi, Pb)2Sr2Ca2Cu3Ox/Ag tapes were measured before and after employing a special radiation technique, which leaves the grain boundary properties largely unaffected. We identify two regions separated by a temperature dependent crossover field Hgb–p. In the low field region, Jc is limited by the transport currents across the grain boundaries, which remain unchanged after irradiation. Above Hgb–p, Jc is limited by flux pinning. In this field region, the artificial defects optimize flux pinning and enhance Jc.