Temperature and twist angle dependences of Josephson effect measured in [001] twist boundary of Bi-superconductor bicrystals

Bing She Xu, Hideki Ichinose, Shun Ichiro Tanaka, Yoichi Ishida

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Josephson junctions both direct (S/S) and indirect (S/Ag/S) with a thin silver layer were fabricated by solid state joining of (001) surfaces of two flaky Bi2Sr2CaCu2Ox single crystals. A small area junction of 100∼200 μm in diameter was fabricated by Ar+ ion selective etching of one of the two thin single crystalline superconducting Bi2Sr2CaCu2Ox flakes. A silver layer with a thickness of 2∼100 nm was deposited on the (001) planes by a sputtering method just prior to joining to produce S/Ag/S junctions. The critical current Ic of S/Ag/S junction was the function temperature with Ic = IOH(1-T/Tc)2 for T≧0.6Tc, and Ic=IOL exp (-GT1/2) for T≦0.5Tc. High Ic values were obtained when the [001] twist angle θ was 23°, 28° and 37°. It was indicated that the Josephson effect is strongly influenced by both the temperature T and the [001] twist angle θ in the S/S and S/Ag/S junctions.

本文言語English
ページ(範囲)121-127
ページ数7
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
60
2
DOI
出版ステータスPublished - 1996

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学

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