Influence of micro-structure in the low temperature critical currents of YBa2Cu3O7-δ thin films

Journal article (1996)

Authors

J. C. Martinez Vrije Universiteit Amsterdam, University of Mainz
B. Dam Vrije Universiteit Amsterdam
B. Stäuble-Pümpin Vrije Universiteit Amsterdam
G. Doornbos Vrije Universiteit Amsterdam
R. Surdeanu Vrije Universiteit Amsterdam
U. Poppe Forschungszentrum Jülich
R. Griessen Vrije Universiteit Amsterdam
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Published Date

1996

Language

English

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Abstract

Epitaxial YBa2Cu3O7-δ films nucleate in c-axis oriented single-crystalline islands. The surface of the single-crystalline SrTiO3 substrates exhibit steps of one third of the YBa2Cu3O7-δ c-axis. These steps generate a mismatch in the island boundaries between the CuO2 superconducting blocks. We show that these defect regions are strong candidates for being the pinning centers responsible for the large critical currents observed in Laser Ablated and Sputtered thin films.