Proximity effect in YBa sub 2 Cu sub 3 O sub 7 /Y sub 0. 6 Pr sub 0. 4 Ba sub 2 Cu sub 3 O sub 7 /YBa sub 2 Cu sub 3 O sub 7 junctions
Journal Article
·
· Physical Review Letters; (United States)
- Department of Physics, and the Crown Center for Superconductivity, Technion-Israel Institute of Technology, Haifa 32000 (Israel)
- Department of Physics and Astronomy, Tel-Aviv University, Ramat-Aviv, Tel-Aviv (Israel)
We report critical-current measurements in all high-{ital T}{sub {ital c}} superconducting-normal-superconductor junctions using Y{sub 0.6}Pr{sub 0.4}Ba{sub 2}Cu{sub 3}O{sub 7} (with {ital T}{sub {ital c}{ital N}}=40 K) as the normal metal. Above {ital T}{sub {ital c}{ital N}}, we find a clear exponential dependence of {ital I}{sub {ital c}} on the thickness of the barrier which is characteristic of the proximity effect. The order-parameter decay length is about 120 A for {ital T}{gt}60 K, and it diverges as {ital T}{sub {ital c}{ital N}} is approached. We estimate that {xi}{sub 0} for this material is 80{plus minus}25 A.
- OSTI ID:
- 5993991
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:21; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5419892
Related Subjects
36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665412 -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRITICAL CURRENT
CUPRATES
CURRENTS
DIMENSIONS
ELECTRIC CURRENTS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
JUNCTIONS
ORDER PARAMETERS
OXIDES
OXYGEN COMPOUNDS
PROXIMITY EFFECT
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
THICKNESS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665412 -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
CRITICAL CURRENT
CUPRATES
CURRENTS
DIMENSIONS
ELECTRIC CURRENTS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
JUNCTIONS
ORDER PARAMETERS
OXIDES
OXYGEN COMPOUNDS
PROXIMITY EFFECT
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
THICKNESS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES