Dynamically enhanced supercurrents in granular superconducting Y-Ba-Cu-O thin films

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00682191· OSTI ID:5265438

Driessen, A; Tang, Q; Hoekstra, P; Popma, Th J.A. ^[1]

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1. Univ. of Twente, Enschede (Netherlands)

Thin superconducting films of Y-Ba-Cu-O with T{sub c0} {congruent} 89 K were prepared by the aerosol-deposition method. The voltage-current characteristic of microbridges (typically 10 {times} 10 {mu}m{sup 2}) made from the finely granular films, which behave like a network of boundary Josephson junctions, is highly nonlinear and shows besides thermal effects evidence for dynamic enhancement of the supercurrent. The authors experimental data are in qualitative agreement with a theory developed for conventional superconductors by Aslamazov and Larkin and also by Tinkham. A value for the electron-phonon scattering time was derived: {tau}{sub E} {congruent} 15 ps.

• OSTI ID: 5265438
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 85:5-6; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE
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& Refractories-- Superconducting Properties-- (1992-)
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CURRENTS
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
FILMS
GRANULAR MATERIALS
HIGH-TC SUPERCONDUCTORS
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OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES