Europium, barium, copper oxide film superconductors

Details Europium, barium, copper oxide film superconductors Europium, barium, copper oxide film superconductors

C - Chemistry, Metallurgy

23

C

117/103, 117/109

C23C 18/12 (2006.01)

Patent

CA 1311164

C-3984 EUROPIUM, BARIUM, COPPER OXIDE: FILM SUPERCONDUCTORS Abstract of the Disclosure 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. An ink comprising the neodecanoates of the rare earth metal, barium, and copper is formed and spun on a single crystal substrate of strontium titanate. The ink is dried in an air environment, heated in an air environment at a temperature sufficient to decompose the neodecanoates, about 500°C, and then annealed to promote recrystallization and grain growth of the remaining 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 of time ranging between about instantaneous to about 2 minutes. The resulting films of material exhibit superconductive characteristics at elevated temperatures.

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