MISC

2009年6月

Preparation of Narrowed YBa2Cu3O7-x Nanobridges Down to 30 nm With Reduced Degradation

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
  • Kemmei Kajino
  • ,
  • Taishi Kimura
  • ,
  • Yuuki Horii
  • ,
  • Mitsuhiro Watanabe
  • ,
  • Masumi Inoue
  • ,
  • Akira Fujimaki

19
3
開始ページ
178
終了ページ
182
記述言語
英語
掲載種別
DOI
10.1109/TASC.2009.2018189
出版者・発行元
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

We have established the new method of fabricating high-J(c) YBa2Cu3O7-x (YBCO) nanobridges with high reproducibility. Nanobridges ranging in 30-400 nm wide were formed by using electron beam lithography. An ultra thin film of 2-3 nm-thick insulative YBCO was deposited after nanobridge formation for recovering the damaged films occurred in the process. The critical current density J(c) was approximately 620 MA/cm(2) at 4.2 K in a width of 30 nm bridges, and increased by about two orders of magnitude in the different widths of J(c). The critical temperature T-c was 87 K, about the same as T-c of the film. The current-voltage characteristics showed a different curve from the conventional flux-flow type as the widths have been narrowed. Nanobridges developed in this study are expected to the applications for nano-SQUIDs or the optical input/output interfaces in single-flux-quantum circuits.

Web of Science ® 被引用回数 : 9

リンク情報
DOI
https://doi.org/10.1109/TASC.2009.2018189
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000268282000013&DestApp=WOS_CPL
ID情報
  • DOI : 10.1109/TASC.2009.2018189
  • ISSN : 1051-8223
  • Web of Science ID : WOS:000268282000013

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