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

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

4511

Lastpage

4514

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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.784028

Filename

784028