Preparation of superconducting Tl-Ca-Ba-Cu thin films by chemical deposition
A chemical deposition process for the preparation of superconducting thin films of Tl/sub 2/CaBa/sub 2/Cu/sub 2/O/sub 8/ (2122) and Tl/sub 2/Ca/sub 2/Ba/sub 2/Cu/sub 3/O/sub 10/ (2223) has been developed. Oriented, superconducting 2122 and 2223 thin films have been successfully fabricated on single-crystal yttria-stabilized zirconia and magnesium oxide substrates (<100> orientation). Epitaxial films have been prepared on magnesium oxide. Chemical analysis of the film composition by energy dispersive x-ray analysis is in agreement (2122 vs 2223) with the phases indicated by powder x-ray diffraction. The thin films of these compounds exhibited superconducting transition temperatures above 105 K as determined by variable-temperature resistivity and ac magnetic susceptibility measurements. In addition, microwave surface resistance measurements at 150 GHz show that these films have very low losses at 77 K (1 m..cap omega..).
- Research Organization:
- Superconductor Technologies, Inc., 460 Ward Drive, Suite F, Santa Barbara, California 93111-2310(US); Department of Physics, University of California, Los Angeles, Los Angeles, California 90024-1547
- OSTI ID:
- 6098096
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 55:2; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
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
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COATINGS
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DEPOSITION
DIFFRACTION
FABRICATION
FILMS
LOW TEMPERATURE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SUPERCONDUCTING FILMS
SURFACE COATING
THALLIUM COMPOUNDS
THALLIUM OXIDES
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VAPOR DEPOSITED COATINGS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES