Highly oriented as-deposited superconducting laser ablated thin films of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub delta/ on SrTiO/sub 3/, zirconia, and Si substrates
KrF excimer laser ablation of an Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub delta/ pellet in 0.1--0.2 Torr of O/sub 2/ ambient was used to deposit thin superconducting films onto SrTiO/sub 3/, yttria-stabilized zirconia (YSZ), and silicon substrates at 600--700 /sup 0/C. The as-deposited 1-..mu..m-thick films at 650--700 /sup 0/C substrate temperature were superconducting, without further high-temperature annealing. All films had a similar T/sub c/ onset of approx.92 K but different zero-resistance T/sub c/ of 90, 85, and 70 K for the films on SrTiO/sub 3/, YSZ, and Si substrates, respectively. Angular x-ray diffraction analysis showed that all the films were highly oriented with the c axis perpendicular to their surface. Critical current densities at 77 K were about 40 000 and 10 000 A/cm/sup 2/ for the films on SrTiO/sub 3/ and YSZ, respectively. Smooth surface morphology was observed in all films, with occasional defects and cracks in the films on YSZ, which seems to explain the lower critical current in these films.
- Research Organization:
- Physics Department, Technion-Israel Institute of Technology, Haifa 32000, Israel
- OSTI ID:
- 6711540
- Journal Information:
- Appl. Phys. Lett.; (United States), Vol. 53:23
- Country of Publication:
- United States
- Language:
- English
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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
ABLATION
CRITICAL CURRENT
MORPHOLOGY
SURFACE COATING
COPPER OXIDES
SILICON
VAPOR DEPOSITED COATINGS
STRONTIUM OXIDES
SUPERCONDUCTING FILMS
FABRICATION
TITANIUM OXIDES
YTTRIUM OXIDES
ZIRCONIUM OXIDES
CURRENT DENSITY
EXPERIMENTAL DATA
LASER RADIATION
LOW TEMPERATURE
THICKNESS
THIN FILMS
TRANSITION TEMPERATURE
VERY HIGH TEMPERATURE
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COATINGS
COHERENT SCATTERING
COPPER COMPOUNDS
CURRENTS
DATA
DEPOSITION
DIFFRACTION
DIMENSIONS
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
ELEMENTS
FILMS
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
SEMIMETALS
STRONTIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360204 - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity