DocumentCode
1492808
Title
Josephson junctions with bulk YBa2Cu3O7-x, Bi2Sr2 CaCu2Ox and Tl2Ca2Ba 2Cu3O10+x
Author
Eidelloth, W. ; Barnes, F.S. ; Geller, S. ; Wu, K.Y. ; Sheng, Z.Z. ; Hermann, A.M.
Author_Institution
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Volume
25
Issue
2
fYear
1989
fDate
3/1/1989 12:00:00 AM
Firstpage
939
Lastpage
942
Abstract
The characteristics of point contacts with combinations of Pb, YBa 2Cu3O7-x, Bi2Sr2CaCu2Ox, (YBCO), (BSCCO), and Tl2Ca2Ba2Cu3O 10+x (TCBCO) have been measured in a shielded liquid helium dewar. Zero-voltage currents were found in all arrangements; diffraction patterns in the voltage-flux curves were observed with all materials. Electron pairs were confirmed as carriers in all investigated high-T c materials. All junctions resembled weak-link bridge structures rather than tunnel junctions. Despite strong shunting, hysteresis was found in the I -V curves of some point contacts. A structure of unknown origin was found in the I -V curves of YBCO-BSCCO junctions. Both YBCO-YBCO and BSCCO-BSCCO junctions had much lower normal resistances and considerably higher critical currents than YBCO-BSCCO point contacts. The reason for this phenomenon is not yet understood
Keywords
Josephson effect; barium compounds; bismuth compounds; calcium compounds; critical currents; high-temperature superconductors; point contacts; strontium compounds; thallium compounds; yttrium compounds; Bi2Sr2CaCu2Ox; I-V curves; Josephson junctions; Tl2Ca2Ba2Cu3O 10+x; YBa2Cu3O7-x; critical currents; diffraction patterns; electron pairs; high temperature superconductor; hysteresis; normal resistances; point contacts; strong shunting; voltage-flux curves; weak-link bridge structures; zero voltage currents; Bismuth compounds; Bridge circuits; Diffraction; Electrons; Helium; Hysteresis; Josephson junctions; Strontium; Voltage; Yttrium barium copper oxide;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.92442
Filename
92442
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