Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819366 | Physica C: Superconductivity and its Applications | 2009 | 4 Pages |
Abstract
It was previously shown that the apparent pinning potential U0â associated with the relaxation of superconducting current at low magnetic fields depended on the thickness of superconducting layer for IBAD/PLD-processed YBCO-coated conductors. It is necessary to clarify the thickness dependence of the relaxation property at high magnetic fields for application of YBCO-coated conductors in a persistent current mode at such magnetic fields. In this study, the thickness dependence was investigated in the field range of 1-6 T at 20 K for IBAD/PLD-processed YBCO-coated conductors with the superconducting layer thicknesses of 0.25-1.0μm. It was found that U0â decreases monotonically with decreasing thickness at 6 T. This seems to be attributed to the two-dimensional pinning mechanism because of the longitudinal flux bundle size limited by the film thickness.
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Condensed Matter Physics
Authors
F. Matsutani, K. Himeki, M. Kiuchi, E.S. Otabe, T. Matsushita, S. Miyata, A. Ibi, Y. Yamada, Y. Shiohara,