Effects of the flux creep and pinning energies on the critical current density of high quality Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub x/ epitaxial films

Epitaxial Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub x/ (YBCO) films with very smooth surface morphology and excellent electrical properties (T/sub c/=92 K, J/sub c/=10/sup 7/ A/cm/sup 2/) were grown on.<
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