Millimeter wave surface resistance of epitaxially grown YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/ thin films
We have measured the surface resistance of two c-axis oriented YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/ thin-film samples in a copper host cavity at 86.7 GHz between 4.2 and 300 K. High quality films of 0.6 and 0.4 ..mu..m thickness have been grown epitaxially on SrTiO/sub 3/ by pulsed excimer laser ablation. Their millimeter wave absorption drops sharply at a transition temperature of 86 and 88 K to a corresponding surface resistance at 77 K of 18 m..cap omega.. and less than 8 m..cap omega.., respectively. These values exceed the best results on polycrystalline samples and come close to the expectation from classical superconductors. Therefore, applications of high T/sub c/ superconductors up to THz frequencies can be envisaged now.
- Research Organization:
- Fachbereich Physik, Bergische Universitaet, Gesamthochschule Wuppertal, D-5600 Wuppertal 1, West Germany
- OSTI ID:
- 6552555
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 54:8; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
FILMS
INFORMATION
LOW TEMPERATURE
MEDIUM TEMPERATURE
METALS
MICROWAVE RADIATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
THIN FILMS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES