Title :
Characteristic temperature dependence of the maximum Josephson current in Bi-Sr-Ca-Cu-O intrinsic junctions
Author :
Suzuki, M. ; Watanabe, T. ; Matsuda, A.
Author_Institution :
NTT Basic Res. Labs., Ibaraki, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
We have measured the temperature dependence of the maximum Josephson current I/sub c/ for 15-30 nm thick stacks comprised of 10 to 20 Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+/spl delta// intrinsic junctions. It is found that I/sub c/ typically shows little saturation at low temperatures but continues to increase noticeably as temperature decreases towards T=0. This behavior becomes significant as the normal tunneling resistance increases with decreasing oxygen content.
Keywords :
Josephson effect; bismuth compounds; calcium compounds; critical currents; high-temperature superconductors; strontium compounds; superconducting junction devices; 15 to 30 nm; Bi-Sr-Ca-Cu-O intrinsic junctions; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; HTSC; low temperatures; maximum Josephson current; normal tunneling resistance; oxygen content; temperature dependence; Crystals; Current measurement; Josephson effect; Josephson junctions; Laboratories; Superconducting devices; Superconducting transition temperature; Superconductivity; Temperature dependence; Temperature measurement;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
