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タイトル: FABRICATION OF YBACUO NONSUPERCONDUCTIVE-YBACUO/YBACUO COPLANAR JOSEPHSON-JUNCTION BY FOCUSED ION-BEAM
著者: Soutome, Yoshihisa
Gheem, YG
Okabe, Yoichi
著者(別言語): 岡部, 洋一
発行日: 1995年6月
出版者: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
掲載誌情報: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 5 (2): 2624-2627 Part 3
抄録: Thin film of YBa(2)Cu3O(7-delta) grown on the MgO substrate damaged by a focused ion beam loses superconductivity due to an abnormal growth. We have fabricated a YBa2Cu3O7-delta co-planar Josephson junction whose coupling region is a nonsuperconductive YBa2Cu3O7-delta grown on an MgO substrate damaged locally by a scan of a focused ion beam. The I-V characteristic of the junction behaves like a flux how type. At temperatures from 4.2K to 60K, Shapiro steps were observed for the junctions in which the length of the coupling region was from 0.2 mu m to 1 mu m. The highest IcRn product of the junction was 5.0mV. The critical current density decreased exponentially with the junction length. It is considered that nonsuperconductive YBa2CU3O7-delta grown on the damaged substrate works as a normal layer in an S-N-S junction. Also the junction responded to the magnetic field and behaved like asymmetric de-SQUID.
URI: http://hdl.handle.net/2261/42
ISSN: 10518223
出現カテゴリ:16610 学術雑誌論文
015 技術・工学

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