Josephson effect above 77 K in a YBaCuO break junction

Journal Article · Mon Aug 17 04:00:00 EDT 1987 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.98392· OSTI ID:6480484

Moreland, J; Goodrich, L F; Ekin, J W; Capobianco, T E; Clark, A F; Braginski, A I; Panson, A J

We have observed the Josephson effect in a YBaCuO break junction. Critical currents as high as 10 mA were measured at 4 K for break junctions with a point contact within the fracture of a sample. The junction was susceptible to microwave radiation showing Shapiro steps with the ratio of V/f of 2.04 +- 0.05 ..mu..V/GHz compared to the pair tunneling value of h/2e = 2.068 ..mu..V/GHz. These steps were clearly visible in the current-voltage characteristics at tempertures up to 85 +- 5 K.

• Research Organization: National Bureau of Standards, Electromagnetic Technology Division, Boulder, Colorado 80303
• OSTI ID: 6480484
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 51:7; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FABRICATION
INFORMATION
JOSEPHSON EFFECT
JUNCTIONS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT
YTTRIUM COMPOUNDS
YTTRIUM OXIDES