Title :
Fabrication of S-N-S Josephson junctions of Y-Ba-Cu-O/Au/Nb thin film sandwiches
Author :
Akoh, H. ; Shinoki, F. ; Takahashi, M. ; Takada, S.
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
3/1/1989 12:00:00 AM
Abstract :
The authors fabricated S-N-S (superconductor-normal-superconductor) Josephson junctions which consist of Y-Ba-Cu-O/Au/Nb thin-film sandwiches with various thicknesses of the Au barrier. Due to the AC-Josephson effect, Shapiro steps are observed in the S-N-S junctions under microwave radiation. The magnetic-field dependence of the critical current shows that the junctions behave as self-field-limited Josephson junctions. From the temperature dependence of the critical current near the transition temperature of the junctions, it is found that the thickness of the Au barrier is shorter than the coherence length of Au
Keywords :
Josephson effect; barium compounds; coherence length; critical currents; gold; high-temperature superconductors; niobium; superconducting transition temperature; yttrium compounds; AC-Josephson effect; Au barrier; Au barrier thickness effects; S-N-S Josephson junctions; S-N-S junctions; Shapiro steps; YBaCuO-Au-Nb thin films; coherence length of Au; critical current; fabrication; high temperature superconductor; magnetic-field dependence; microwave radiation; self-field-limited Josephson junctions; superconductor-normal-superconductor; temperature dependence; transition temperature; Critical current; Fabrication; Gold; Josephson junctions; Niobium; Superconducting devices; Superconducting microwave devices; Superconducting transition temperature; Temperature dependence; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
