Properties of all YBa sub 2 Cu sub 3 O sub 7 Josephson edge junctions prepared by in situ laser ablation deposition

Journal Article · Mon Feb 11 04:00:00 EST 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104552· OSTI ID:5941110

Koren, G; Aharoni, E; Polturak, E; Cohen, D ^[1]

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1. Physics Department, Technion-Israel Institute of Technology, Haifa 32 000, Israel (IL)

Thin-film YBa{sub 2}Cu{sub 3}O{sub 7}-YBa{sub 2}Cu{sub 3}O{sub 7} edge junctions of 0.4{times}10 {mu}m{sup 2} cross section were prepared {ital in} {ital situ} by a multistep laser ablation deposition process. The fabrication time was about 3 h and the yield of good devices was 50%. Typical junctions reached zero resistance at 72 K and had a critical current density {ital J}{sub {ital c}} of 300 A/cm{sup 2} at 70 K. Their {ital J}{sub {ital c}} as a function of temperature increased slowly with decreasing temperature down to 65 K and much faster below it. In the region of low {ital J}{sub {ital c}} we observed suppression of the critical current by a magnetic field. Under microwave radiation clear Shapiro steps were observed whose magnitude versus the microwave field agreed qualitatively with the resistively shunted junction model of a current biased junction.

• OSTI ID: 5941110
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 58:6; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
FABRICATION
FILMS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES