Epitaxial growth and critical current density of thin films of YBa/sub 2/Cu/sub 3/O/sub 7/minus//ital x// on LaAlO/sub 3/ substrates
Thin films of the high-temperature superconductor YBa/sub 2/ Cu/sub 3/ O/sub 7/minus/x/ have been produced on (100) LaAlO/sub 3/ substrates by coevaporation and furnace annealing. A 14-..mu..m-wide and 400-..mu..m-long constriction patterned on a 0.8-..mu..m-thick film had a zero resistance transition temperature of 90 K, a transition width of 1.5 K, and a critical current density of 8/times/10/sup 4/ A cm/sup /minus/2/ at 77 K. Although x-ray diffraction shows a definite /ital c/-axis alignment normal to the substrate plane, further analysis reveals that /ital c/-axis alignment in the substrate plane is also present. The detailed microstructural picture is revealed by transmission electron microscopy: a continuous layer, about 0.2 ..mu..m thick adjacent to the substrate, with /ital c/ axis normal to the substrate plane, and the remaining top portion of the film, with the /ital c/ axis in the film plane. In spite of the bilayer structure, the film remains epitaxial (the axes of the superconductor are parallel to the <100> directions of the substrate).
- Research Organization:
- GE Research and Development Center, Schenectady, New York 12301(US)
- OSTI ID:
- 6052012
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 54:26; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Epitaxial thin films of YBa sub 2 Cu sub 3 O sub 7 minus x on LaAlO sub 3 substrates deposited by plasma-enhanced metalorganic chemical vapor deposition
X-ray study of in-plane epitaxy of YBa/sub 2/Cu/sub 3/O/sub /ital x// thin films
Related Subjects
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204* -- Ceramics
Cermets
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656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COATINGS
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENTS
DATA
ELECTRIC CURRENTS
ELECTRON MICROSCOPY
EPITAXY
EXPERIMENTAL DATA
FABRICATION
FILMS
HEAT TREATMENTS
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LAYERS
MICROSCOPY
MICROSTRUCTURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTING FILMS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES