DocumentCode
1492816
Title
Josephson effect and macroscopic quantum interference in high-T c superconducting thin-film weak links at 77 K
Author
Golovashkin, A.I. ; Gudkov, A.L. ; Krasnosvobodtsev, S.I. ; Kuzmin, L.S. ; Likharev, K.K. ; Maslennikov, Yu.V. ; Pashkin, Yu A. ; Pechen, E.V. ; Snigirev, O.V.
Author_Institution
Lebedev Inst. of Phys., Acad. of Sci., Moscow, USSR
Volume
25
Issue
2
fYear
1989
fDate
3/1/1989 12:00:00 AM
Firstpage
943
Lastpage
945
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 SrTiO3 and LiNbO3 substrates by laser sputtering of ceramic targets. Values of critical current I c and normal resistance R n of the weak links could be altered by plasma etching of the structures. I cR n products up to 100 μV 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
Keywords
Josephson effect; barium compounds; high-temperature superconductors; sputtered coatings; superconducting junction devices; superconducting thin films; yttrium compounds; 77 K; Dayem microbridges; Josephson effect; LiNbO3; Shapiro steps; SrTiO3; YBa2Cu3Oy; ceramic targets; critical current; double microbridge structures; high temperature superconductor; laser sputtering; macroscopic quantum interference; microwave radiation; normal resistance; photolithography; plasma etching; superconducting thin-film weak links; Ceramics; Copper; Critical current; Interference; Josephson effect; Lithography; SQUIDs; Sputtering; Superconducting microwave devices; Superconducting thin films;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.92443
Filename
92443
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