Critical current densities and transport in superconducting YBa2Cu3O7-δ films made by electron beam coevaporation

Oh, B.; Naito, M.; Arnason, S.; Rosenthal, P.; Barton, R.; Beasley, M. R.; Geballe, T. H.; Hammond, R. H.; Kapitulnik, A.
September 1987
Applied Physics Letters;9/14/1987, Vol. 51 Issue 11, p852
Academic Journal
Thin films of the high Tc superconductor YBa2Cu3O7-δ were prepared and characterized. The films made on SrTiO3 showed epitaxial growth and high critical current densities in excess of 9×104 at 78 K and 2×106 at 4.2 K. Also, surface pinning in the parallel direction was found to be very high. The measurements put a lower limit on the depairing critical current density of 5×107 A/cm2.


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