Extended dislocation-based pinning mechanism in superconducting YBa2Cu3O7 films

Authors

Serhiy Pysarenko, University of WollongongFollow
Alexey V. Pan, University of WollongongFollow
S X. Dou, University of WollongongFollow
Rashmi Nigam, University of WollongongFollow

RIS ID

32926

Publication Details

Pan, A. V., Pysarenko, S., Dou, S. Xue. & Nigam, R. (2010). Extended dislocation-based pinning mechanism in superconducting YBa2Cu3O7 films. Journal of Applied Physics, 107 (9), 1-3.

Abstract

To describe the critical current density (J_c) as the function of applied magnetic field (B_a) in high quality YBa₂Cu₃O₇ (YBCO) superconducting films, the vortex pinning mechanism along the structural domain boundaries of the films is developed. The boundaries, assumed to have low misorientation angles, are quantitatively considered to consist of individual edge dislocations acting as pinning wells, rather than a continuous boundary. This extended model accurately describes the experimental J_c(B_a) over the wide field and temperature ranges. Marginal deviations of the model from the experimental J_c(B_a) curves are observed at high fields and temperatures where thermally activated depinning is significant. This pinning model is verified to provide precise structural properties of the films which can be obtained by other considerations.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205