Characteristics of high performance YBa sub 2 Cu sub 3 O sub 7 step-edge junctions

Journal Article · Mon Aug 31 04:00:00 EDT 1992 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.107690· OSTI ID:7172811

Luine, J; Bulman, J; Burch, J; Daly, K; Lee, A; Pettiette-Hall, C; Schwarzbek, S ^[1]; Miller, D ^[2]

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1. TRW Space and Technology Group, One Space Park, Redondo Beach, California 90278 (United States)
2. Material Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Step-edge Josephson junctions are engineered grain boundary junctions fabricated using standard lithographic and film deposition techniques. We report a systematic study of 180 YBa{sub 2}Cu{sub 3}O{sub 7} step-edge junctions and identify a fabrication technique which results in a 90% yield of working junctions with critical current spreads from 30% to 50% (1{sigma}/{ital I}{sub {ital c}-ave})over the entire substrate. Technically useful critical current values at 65 K can be obtained by adjusting YBa{sub 2}Cu{sub 3}O{sub 7} film thickness. {ital I}{sub {ital c}R{ital n}} values, approximately independent of film thickness, are {similar to}1 mV at 4.2 K and {similar to}0.1 mV at 65 K. Most junctions exhibit ideal electrical behavior in accordance with the RSJ model.

• OSTI ID: 7172811
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 61:9; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DEPOSITION
ETCHING
FABRICATION
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
JUNCTIONS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
SURFACE FINISHING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES