Properties of stacked Nb/Al-AlOx/Nb tunnel junctions
- 1 February 1993
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 6 (2) , 146-149
- https://doi.org/10.1088/0953-2048/6/2/012
Abstract
Successful fabrication of stacked Nb-(Al/AlOx-Nb)n superconducting tunnel junctions with n=3 is reported. Coupling effects are visible in the three measured Fraunhofer patterns of the individual junctions. One of the patterns always shows a considerable field spreading in comparison with the other two patterns, as if the corresponding junction area were much smaller. Negative resistance measured as a function of temperature between 4.2 K and 2 K, in the sum gap region of the I-V characteristics, indicates heating effects.Keywords
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