Claims
- 1. A method of producing a superconductor, comprising the steps of:(a) forming, on a substrate, a precursor laminate film having a first film containing (1) M, which is at least one element selected from the group consisting of Ba, Sr and Ca, (2) Cu and (3) O and a second, mercury oxide film provided on said first film; (b) placing said precursor laminate film-bearing substrate in a closed vacuum chamber together with a first pellet containing Hg, M which is as defined above, Cu and O and a second pellet containing M which is as defined above, Cu and O; and (c) heating said precursor laminate film-bearing substrate and said first and second pellets in said vacuum chamber to form, on said substrate, a superconducting film having a thickness in the range of between 300 Å to 950 Å and containing Hg, M, Cu and O.
- 2. A method as claimed in claim 1, further comprising repeating steps (a) through (c) using the product obtained in step (c) as said substrate in step (a) until laminated superconducting films have a desired thickness.
- 3. A method as claimed in claim 2, wherein said first and second films and said first and second pellets used in respective repetition are the same so that the laminated superconducting films have the same composition.
- 4. A method as claimed in claim 2, wherein said first and second films and said first and second pellets used in respective repetition are different so that the laminated superconducting films have different compositions.
- 5. A method as claimed in claim 1 wherein the thickness of the first film is within the range of 400-1400 Å and wherein the thickness of the second film is within the range of 200-1400 Å.
- 6. A method as claimed in claim 5 wherein the first film is Ba2CaCu2Oy and the second film is HgO.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11-242418 |
Aug 1999 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims, under 35 USC 119, priority of Japanese Application No. 11-242418 filed Aug. 30, 1999.
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