Critical Current Density and Its Hysteresis in Magnetic Field for Ba-Y-Cu-O Films Prepared by a Sputtering Technique
- 1 April 1989
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 28 (4A) , L628
- https://doi.org/10.1143/jjap.28.l628
Abstract
A considerably large transport critical current density J c (1.2×105 A/cm2 at 4.2 K and 15 T) was observed for the superconducting Ba-Y-Cu-O thin films prepared by an rf sputtering method. In association with such a large J c, the hysteresis of J c against the applied magnetic field was smaller compared to that in bulk samples prepared by a solid phase reaction method. It was considered that a fairly smooth morphology of grain boundaries in the thin films improved superconducting properties. The hysteresis of J c was discussed on the basis of the weak link model.Keywords
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