Process for preparing a-axis oriented high-temperature supercond

Details Process for preparing a-axis oriented high-temperature supercond Process for preparing a-axis oriented high-temperature supercond

1991-03-11

1992-09-29

Beck, Shrive

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505731, 505732, 427 62, 4274193, 4274192, 427314, 20419224, B05D 512

Patent

active

051514087

ABSTRACT:
A process for preparing a-axis oriented thin film of oxide superconducting material on a substrate by two steps. In the first step, an under-layer of an oxide superconducting material is deposited on the substrate under such a condition that the substrate is heated at a temperature which is suitable to realize an a-axis orientation of crystal of the oxide superconducting material. In the second step, an upper-layer of the same oxide superconducting material is deposited on a surface of the resulting under-layer under such a condition that the substrate is heated at a temperature which is lowered by 10.degree. to 100.degree. C. than the temperature which is used in the first step.

REFERENCES:
Eom et al, "Epitaxial and Smooth films of a-axis YBa.sub.2 Cu.sub.3 O.sub.7 " Science, vol. 249, Sep. 1990 pp. 1549-1552.
Shi et al, "Influence of substrate temperature on the orientation of YBa.sub.2 Cu.sub.3 O.sub.7 films", Appl. Phys. Lett. 57(8) Aug. 1990 pp. 822-824.

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