All a -axis oriented YBa sub 2 Cu sub 3 O sub 7 minus y -PrBa sub 2 Cu sub 3 O sub 7 minus sub z -YBa sub 2 Cu sub 3 O sub 7 minus sub y Josephson devices operating at 80 K

Journal Article · Mon Aug 05 04:00:00 EDT 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.105330· OSTI ID:5739438

Barner, J B; Rogers, C T; Inam, A; Ramesh, R; Bersey, S ^[1]

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1. Bellcore, Red Bank, New Jersey 07701-7040 (US)

We have demonstrated the controllable, reproducible fabrication of nonhysteretic Josephson devices with excess-current weak-link characteristics at temperatures up to 80 K. The devices are patterned from {ital in} {ital situ} deposited {ital a}-axis oriented YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}}-PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital z}}-YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}} trilayers grown on SrTiO{sub 3}(001) substrates. Control of the critical current density and resistance is achieved by varying the thickness of the PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital z}} barrier layer. Critical current densities in excess of 10{sup 4} A/cm{sup 2} have been reproducibly measured; good uniformity across the wafer is obtained with device parameters scaling with device area. Strong constant-voltage current steps are observed under 11.2 GHz microwave radiation at temperatures up to and above 80 K.

• OSTI ID: 5739438
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 59:6; 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
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
FILMS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
JUNCTIONS
LOW TEMPERATURE
OPERATION
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
QUATERNARY COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES