Passivation of superconducting YBa sub 2 Cu sub 3 O sub 7 minus x thin films by a wet fluoride vapor method
- State University of New York at Buffalo, Department of Electrical and Computer Engineering, Institute on Superconductivity, Bonner Hall, Amherst, New York 14260 (US)
Wet hydrofluoric acid (HF) vapor was used to treat YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} superconducting thin films in order to realize highly controllable passivation layers on the film surface. Improved resistance to degradation by water of the films was realized by using this novel technique. {ital In} {ital situ} measurement of the resistance of the thin films, with and without wet HF vapor treatment, showed completely different behavior during deionized water immersion. Both Auger electron spectroscopy surface scanning and depth profile demonstrated the incorporation of fluorine in the surface after wet HF vapor treatment. The formation of an amorphous layer on the film surface, which was the reaction product between HF and erosion materials on the film surface, might be directly related to the improved water resistance of the superconducting YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} thin films.
- OSTI ID:
- 7247002
- Journal Information:
- Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:5; ISSN 0021-8979; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALINE EARTH METAL COMPOUNDS
AUGER ELECTRON SPECTROSCOPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
FILMS
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
OXIDES
OXYGEN COMPOUNDS
PASSIVATION
PHYSICAL PROPERTIES
SPECTROSCOPY
SUPERCONDUCTORS
SURFACES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES