Transport Properties of Superconductive Bi- 2212/YBCO Bilayer Films Prepared by Nd:YAG Laser Ablation(<特集>Special Issue on Superconductive Electronics)
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概要
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We have fabricated a novel type of intrinsic Josephson junctions with superconducting Bi_2Sr_2CaCu_2O_<8+y> (Bi-2212)/YBa_2Cu_3O_<7-x>(YBCO) bilayer thin films deposited on MgO(100) substrates. We used the 4th harmonics of a Nd:YAG pulsed laser ablation. Furthermore, we studied the transport properties of a 25 μm × 25 μm Bi-2212/YBCO mesa-type junction. The zero resistance temperature was around 50 K. The current- voltage characteristics showed flux-flow-like behavior and a supercurrent of about 2 mA at 4.2 K. Shapiro steps were observed when microwave was irradiated to the mesa junction. These Shapiro steps are attributed to the Josephson junction formed at the interface between the Bi-2212 and YBCO layers in the mesa structure and not to the intrinsic Josephson junctions in the Bi-2212 layer or the micro-grains within the films.
- 社団法人電子情報通信学会の論文
- 2002-03-01
著者
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Wang Zhen
Kansai Advanced Research Center Communications Research Laboratory Iwaoka
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Wang Z
Kansai Advanced Research Center Communications Research Laboratory
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IGUCHI Ienari
Department. of Applied Physics, Tokyo Institute of Technology
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Wang Z
Communications Res. Lab. Ministry Of Posts And Telecommunications Kobe‐shi Jpn
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Wang Z
Nanyang Technological Univ. Singapore
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UCHIYAMA Tetsuji
Department of Physics, Tokyo Institute of Technology
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Iguchi I
Department Of Physics Tokyo Institute Of Technology
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Iguchi Ienari
Department Of Applied Physics Tokyo Institute Of Technology
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Uchiyama Tetsuji
Department Of Physics Tokyo Institute Of Technology And Crest-jst
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Uchiyama Tetsuji
Department Of Physics Tokyo Institute Of Technology
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Wang Zhen
Kansai Advanced Research Center Communications Research Laboratory
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