Abstract
We have measured the magnetic field dependence of the supercurrent in micron-size medium and high current density superconducting-normal- superconducting Nb-Au-Nb Josephson junctions. We find good quantitative agreement between the experiment and a theory for the distributed Josephson effect in such junctions. For finite bias voltages, high current density junctions show a monotonic decrease in the effective critical current with increasing field in sharp contrast to the resistively shunted junction model which predicts the well-known Fresnel-type behavior. Our medium current density junctions represent an intermediate case, residual Fresnel behavior is observed at small bias voltages, but a monotonic decrease with the field is observed for higher bias voltages.
Original language | English (US) |
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Pages (from-to) | 7073-7077 |
Number of pages | 5 |
Journal | Journal of Applied Physics |
Volume | 54 |
Issue number | 12 |
DOIs | |
State | Published - Dec 1 1983 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)