Abstract
The Josephson characteristics of YBCO/Au-Ag/Pb SNS junctions were investigated both experimentally and theoretically. A photolithography process together with “in-situ” sputtering preparation of YBCO/Au bilayers has enabled the reproducible fabrication of small junctions on YBCO films with various crystal orientations. Most of the fabricated junctions exhibited a dc Josephson current with a clear Fraunhofer pattern dependence on the applied magnetic field. A numerical analysis based on the Usadel equation revealed that a junction model in which a thin insulating layer was assumed to exist on the YBCO film surface could account for the experimentally observed junction characteristics.
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© 1992 Springer-Verlag Berlin Heidelberg
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Yoshida, J., Hashimoto, T., Inoue, S., Sagoi, M., Mizushima, K. (1992). NS Boundaries and the Proximity Effect in Metal — YBCO Junctions. In: Koch, H., Lübbig, H. (eds) Superconducting Devices and Their Applications. Springer Proceedings in Physics, vol 64. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77457-7_4
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DOI: https://doi.org/10.1007/978-3-642-77457-7_4
Publisher Name: Springer, Berlin, Heidelberg
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