Significantly Enhanced Flux-Pinning in Y-Ba-Cu-O by Simple Processing

Abstract

AbstractSignificantly improved flux-pinning has been achieved in bulk YBa2Cu3O7-δ superconductor (‘123’ compound) containing fine-scale defects (<~50 A thick). The measured Jc(magn.) of ~l05 A/cm2 at 77K, H = 0.9T is about ten times higher than the typical values for bulk Y-Ba-Cu-O. The improved structure was produced by rapid decomposition at 920°C of the YBa2Cu4O8 (‘124’) precursor.