Oxygen plasma treatment for producing high Tc oxide superconduct

Details Oxygen plasma treatment for producing high Tc oxide superconduct Oxygen plasma treatment for producing high Tc oxide superconduct

1989-11-16

1991-06-04

Morgenstern, Norman

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505742, 427 62, 427 39, 204164, 423593, B05D 512, B05D 306

Patent

active

050213962

ABSTRACT:
The invention is an aftertreatment of a high Tc compound oxide type superconducting material by oxygen plasma to improve the superconducting property of the material. The treatment oxygen plasma is preferably performed while the material is heated at 400.degree. to 1,050.degree. C.
The material may have a form of bulky mass or a thin film deposited on a substrate by physical vapour deposition technique.

REFERENCES:
patent: 4900716 (1990-02-01), Fujita et al.
patent: 4929598 (1990-05-01), Bagley et al.
Bednoz et al., "Possible High Tc Superconductivity in the Ba-La-Cu-O System", Z. Phys. B. Condensed Matter 64, p. 189-192 (1986).
Landesman et al., "Magnetic and XPS Studies of YBa.sub.2 Cu.sub.3 O.sub. Annealed in O.sub.2 Plasma", AIP No. 165, Nov. 1987 pp. 389-396.
Tamura et al., "Effects of a Plasma Oxidation of YBa.sub.2 Cu.sub.3 O.sub.7-y Films", Extended Abstracts of ISEC, Aug. 1987, p. 414.
Maeda et al., "A New High-Tc Oxide Superconductor Without a Rare Earth Element", Jpn. J. Appl. Phys., vol. 27(2), Feb. 1988 / 209-210.
Sheng et al., "Superconductivity at 90.degree.K. in the Tl-Ba-Cu-O System", Phys. Rev. Lett., vol. 60(10), Mar. 1988, pp. 937-940.

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