Properties of niobium superconducting bridges prepared by electron‐beam lithography and ion implantation
作者:
Jyongsil Gu,
Wongoon Cha,
Kenji Gamo,
Susumu Namba,
期刊:
Journal of Applied Physics
(AIP Available online 1979)
卷期:
Volume 50,
issue 10
页码: 6437-6442
ISSN:0021-8979
年代: 1979
DOI:10.1063/1.325736
出版商: AIP
数据来源: AIP
摘要:
Niobium superconducting bridges having a variable‐thickness geometry consisting of a thin narrow implanted region joining two much thicker bulk films have been fabricated. The temperature dependence of the critical current is described well by the static theory of Likharev and Yakobson. The direct current and alternate current Josephson effects were observed at temperatures above the transition temperatureT′cof the bridge. The magnetic field period of the ’’diffraction pattern’’ dependence on magnetic field is analyzed taking into account demagnetizing effects in an approximate way. This field periodHpis found as a function of the bridge widthwand the lengthLfor wide bridges (w/L≫1), i.e.,Hp= (&Fgr;0/&mgr;0)/ 22/3w5/3L1/3.
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