All high T sub c edge-geometry weak links utilizing Y-Ba-Cu-O barrier layers
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 (US)
High quality YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}/normal-metal/YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} edge-geometry weak links have been fabricated using nonsuperconducting Y-Ba-Cu-O barrier layers deposited by laser ablation at reduced growth temperatures. Devices incorporating 25--100 A thick barrier layers exhibit current-voltage characteristics consistent with the resistively shunted junction model, with strong microwave and magnetic field response at temperatures up to 85 K. The critical currents vary exponentially with barrier thickness, and the resistances scale linearly with Y-Ba-Cu-O interlayer thickness and device area, indicating good barrier uniformity, with an effective normal metal coherence length of 20 A.
- OSTI ID:
- 5362249
- Journal Information:
- Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 59:8; ISSN APPLA; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
FABRICATION
FILMS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
JUNCTIONS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES