Oxide superconductor and method for producing the same

Details Oxide superconductor and method for producing the same Oxide superconductor and method for producing the same

1996-02-07

1997-09-23

Lieberman, Paul

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

505100, 505776, 252521, 428688, 428701, 428702, H01B 1200, C04B 3501, C04B 35057, H01L 3912

Patent

active

056704585

ABSTRACT:
An oxide superconductor having a composition of the formula: A.sub.n+1 Cu.sub.n O.sub.2n+1+.delta. in which A is at least one alkaline earth metal element selected from the group consisting of calcium, strontium and barium, n is an integer of at least one, and .delta. is a number larger than 0 and not larger than 1, a laminate structure in which a layer having a partial composition of A.sub.2 O.sub.1+.delta. and a layer having a partial composition of A.sub.n-1 Cu.sub.n O.sub.2n are alternately laminated, and a superconductive critical temperature equal to or higher than the liquid nitrogen temperature.

REFERENCES:
patent: 4983575 (1991-01-01), Komuro
patent: 5021659 (1991-06-01), Schneider
Adachi et al "High pressure synthesis of superconducting Sr-Ca-Cu-O samples" Physica C, 208, 1993 (May) pp. 226-230.
Eriksson et al "Oxygen Content and Structural Properties of Ba-Cu Oxides" Physica C, 162-164, 1989 pp. 59-60.
Zhang et al. "Phase diagram of barium-copper-oxygen and yttrium-copper-oxygen . . . " Funtai oyobi, Kyoto Univ. 37(1), 1990, pp. 122-126, (Abstract Only).
Bando, Advances in Superconductivity V, Nov. 1992, ISTEC pp. 211-226.
Geballe, "Paths to Higher Temperature Superconductors" Science vol. 259, Mar. 12, 1993, pp. 1550-1551.
Hiroi, Nature 364, Jul. 22, 1993 pp. 315-317.
Hiroi, Physica C vol. 208 (1993) No. 3-4, Apr. 10, 1993 pp. 286-296.

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