Experimental investigation of the magnetic behavior of superconducting-normal-superconducting Josephson junctions

Journal Article · Thu Dec 01 04:00:00 EST 1983 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.331974· OSTI ID:6694673

Bures, K; Barnes, S E; Baberschke, K

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.

• Research Organization: Institut fuer Atom- und Festkoerperphysik, Freie Universitaet Berlin, Arnimalee 14, D-1000 Berlin 33, Federal Republic of Germany
• OSTI ID: 6694673
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 54:12; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
FABRICATION
GOLD ALLOYS
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FIELDS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY