Method of making polycrystalline thin film and superconducting o

Details Method of making polycrystalline thin film and superconducting o Method of making polycrystalline thin film and superconducting o

1995-08-03

1997-07-22

King, Roy V.

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Coating

505474, 505475, 505434, 505238, 505731, 505732, 20419211, 20419222, 20419224, 20429804, 427 62, 427596, 4271263, 4272557, 4274193, B05D 512, B05D 306

Patent

active

056503784

ABSTRACT:
The present invention relates to a polycrystalline thin film deposit acting as a substrate material composed of grains of a cubic structure in which the intergranular misorientation, defined as the orientation difference between the a-axes (or b-axes) of the neighboring grains, is less than 30 degrees. Such a substrate base is produced by depositing a target material on a base material by sputtering while irradiating the substrate base with ion beams at an oblique angle to the base. The preferred range of the oblique angle is between 40 to 60 degrees. Examples are presented of application of such textured polycrystalline substrate base for the production of superconducting oxide thin layer of outstanding superconducting properties.

REFERENCES:
INSPEC, Institute of Electrical Engineers, AN-439847, O. Kohno, et al., "Improvement of Jc-B Characteristics Biaxially Aligned Y-Ba-Cu-O Thin Films On Metallic Substrate".
Iijima et al, "Biaxially Aligned YSZ buffer layer on polycrystallline substrates", 4th International Symposium On Superconductivity (ISS '91) Oct. 14-17, 1991, Tokyo, Japan.
Iijima et al, Appl. Phys. Lett. 60(6), Feb. 1992, pp. 769-771.
Schmidt et al, Appl. Phys. Lett. 59(2) Jul. 1991, pp. 222-224.
Yu et al, J. Vac. Sci. Technol, A4(3), May/Jun. 1986, pp. 443-447.
Iijima et al, "Biaxially Aligned YBa.sub.2 Cu.sub.3 O.sub.7-x Thin Film Tape", Proceedings of the International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors III, Kanazawa, Japan, Jul. 22-26, 1991, pp. 1959-1960.

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