FORMATION OF FILM SUPERCONDUCTORS BY METALLO-ORGANIC DEPOSITION

Superconducting thin films of RE1Ba2Cu4Oz, where RE is a rare earth metal chosen from the group consisting of yttrium, ytterbium, and europium, are produced in a non-vacuum environment using metallo-organic deposition techniques. A metallo-organic solution comprising the neodecanoates of the rare ea...

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Hauptverfasser:	LAUGAL, RUTH CAROL OLSEN, HAMDI, ABOUD HALAL, MICHELI, ADOLPH LOUIS, MANTESE, JOSEPH VITO, DUNGAN, DENNIS FOREST
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BASIC ELECTRIC ELEMENTS CABLES CEMENTS CERAMICS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS THEREOF CONCRETE CONDUCTORS DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INORGANIC CHEMISTRY INSULATORS LIME, MAGNESIA METALLURGY NON-METALLIC ELEMENTS REFRACTORIES SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES SLAG SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF NATURAL STONE
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Zusammenfassung:	Superconducting thin films of RE1Ba2Cu4Oz, where RE is a rare earth metal chosen from the group consisting of yttrium, ytterbium, and europium, are produced in a non-vacuum environment using metallo-organic deposition techniques. A metallo-organic solution comprising the neodecanoates of the rare earth metal, barium, and copper is formed and spun on a single crystal substrate of strontium titanate to form a film thereon. The metallo-organic film is heated in an air environment at a temperature sufficient to decompose the neodecanoates, about 500 DEG C, and then annealed to promote recrystallization and grain growth of the resulting metal oxides. The annealing step is preferably accomplished using rapid thermal annealing techniques wherein the material is uniformly and rapidly heated to an appropriate temperature for an amount of time of up to about 2 minutes. The resulting films of material exhibit superconductive characteristics at elevated temperatures relative to the temperature of liquid nitrogen.