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Characteristic temperature dependence of the maximum Josephson current in Bi-Sr-Ca-Cu-O intrinsic junctions

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3 Author(s)
Suzuki, M. ; NTT Basic Res. Labs., Ibaraki, Japan ; Watanabe, T. ; Matsuda, A.

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.

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Applied Superconductivity, IEEE Transactions on  (Volume:9 ,  Issue: 2 )