Response of YBaCuO thin-film microbridges to microwave irradiation
Microbridges with widths of about 10 ..mu..m were lift-off structured from rf-sputtered YBaCuO thin films and irradiated with microwaves at different temperatures. The bridges contain only a few grains with a typical size of 4 ..mu..m and are fully c-axis oriented. The observed current-voltage characteristics exhibit sharp constant voltage steps up to 71 K. An oscillatory dependence of the critical current I/sub 0/ and the step heights 2I/sub n/ is observed, clearly revealing Josephson-like behavior. From the grain structure, the critical current, and the microwave response, it is very likely that grain boundaries as superconductor-normal conductor-superconductor (SNS) contacts dominate the behavior of the bridges.
- Research Organization:
- Low Temperature Division, University of Twente, Enschede, The Netherlands
- OSTI ID:
- 6483105
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 54:14; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC BRIDGES
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
EQUIPMENT
FILMS
GRAIN BOUNDARIES
GRAIN SIZE
JOSEPHSON JUNCTIONS
JUNCTIONS
LOW TEMPERATURE
MICROSTRUCTURE
MICROWAVE RADIATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATIONS
SIZE
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES