Josephson effect and macroscopic quantum interference in high-T/sub c/ superconducting thin-film weak links at 77 K

Golovashkin, A. I. and Gudkov, A. L. and Krasnosvobodtsev, S. I. and Kuzmin, L. S. and Likharev, K. K. and Maslennikov, Y. V. and Pashkin, Y. A. and Pechen, E. V. and Snigirev, O. V. (1989) Josephson effect and macroscopic quantum interference in high-T/sub c/ superconducting thin-film weak links at 77 K. IEEE Transactions on Magnetics, 25 (2). pp. 943-945. ISSN 0018-9464

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Abstract

The authors studied the properties of single and double superconducting weak links (Dayem microbridges) fabricated by direct photolithography from thin films of 1-2-3 copper oxides, deposited on SrTiO/sub 3/ and LiNbO/sub 3/ substrates by laser sputtering of ceramic targets. Values of critical current I/sub c/ and normal resistance R/sub n/ of the weak links could be altered by plasma etching of the structures. I/sub c/R/sub n/ products up to 100 mu V were achieved, and well-pronounced Shapiro steps under 8-GHz microwave radiation were observed at 77 K. Macroscopic quantum interference was clearly registered in double microbridge structures at the same temperature.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Transactions on Magnetics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2208
Subjects:
ID Code:
130675
Deposited By:
Deposited On:
22 Jan 2019 10:50
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 11:46