Critical-current measurements in planar Josephson junctions

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.120246· OSTI ID:552929

Rzchowski, M S; Hinaus, B M ^[1]

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1. Physics Department and Applied Superconductivity Center, University of Wisconsin---Madison, Madison, Wisconsin 53706 (United States)

The properties of planar high-temperature superconducting Josephson junctions are not entirely consistent with low T{sub c} models. Some of these disparities may be intrinsic, related to the unusual superconducting properties of the electrodes, while others are due to the nonstandard planar geometry. By comparing experimental measurements of a 24{degree} bicrystal substrate Josephson junction with a simple model of nonuniform current flow in a planar geometry, we show that several unusual properties can be explained as extrinsic. We show that nonuniform current feed in a planar geometry leads to a reduced critical current, an unchanged Meissner field H{sub co}, and a power-law dependence of the critical current on H{sub co} different from that expected in an overlap geometry. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 552929
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 20 Vol. 71; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
ELECTRODES
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
MAGNETIC FIELDS
TEMPERATURE DEPENDENCE
THIN FILMS
YTTRIUM OXIDES