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Proceedings Paper

Bridge Type Josephson Junction in YBaCuO Thin Films by MOCVD
Author(s): Tsutomu Yamashita; Toshio Hirai; Hideyuki Kurosawa; Toshiaki Matsui
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Paper Abstract

Micro-bridges are fabricated with YBa2Cu3O7-8 thin films prepared by CVD method. The thickness of the bridge is ranging from 0.2 to 1 µm and the width and length are both about 1 µm. The critical current density of the bridge is ranging from 104 to 105 A/cm2 at 77K in zero field. The bridge shows clear ac and dc Josephson effects. However, temperature dependences of critical current show Ic oc (1-T/Tc)3/2, which suggests the transport current is superconducting bulk current and not Josephson current. The single bridge looks like a typical Josephson junction and all transport current in the bridge behaves as Josephson current.

Paper Details

Date Published: 19 March 1990
PDF: 11 pages
Proc. SPIE 1187, Processing of Films for High Tc Superconducting Electronics, (19 March 1990); doi: 10.1117/12.965172
Show Author Affiliations
Tsutomu Yamashita, Nagaoka University of Technology (Japan)
Toshio Hirai, Tohoku University (Japan)
Hideyuki Kurosawa, Riken Co. (Japan)
Toshiaki Matsui, Ministry of Posts and Telecommunications (Japan)

Published in SPIE Proceedings Vol. 1187:
Processing of Films for High Tc Superconducting Electronics
T. Venkatesan, Editor(s)

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