Rock-salt/infinite layer chlorine-containing oxide superconducto

Details Rock-salt/infinite layer chlorine-containing oxide superconducto Rock-salt/infinite layer chlorine-containing oxide superconducto

1996-03-20

1998-02-10

Lieberman, Paul

Superconductor technology: apparatus, material, process

High temperature , per se

Halogen containing

505125, 505776, 505779, 505482, 252521, H01B 1200, C04B 3501, C04B 35645

Patent

active

057169071

ABSTRACT:
The present invention is an oxide superconductor containing alkaline earth metal M (where M is at least one element of Ba, Sr, and Ca) and having a crystalline structure in which a portion based on two rock-salt structures including the alkaline earth metal M, oxygen, and chlorine, and a 2n-1 piece of infinite layer structure portion are alternately layered on each other, said 2n-1 piece of infinite layer structure portion having an atom layer including copper atoms and oxygen atoms in a ratio of 1 to 2 and of an atom layer including only M atoms layered on each other (where n is an integer of 1 or more and where copper atoms and oxygen atom are contained in a ratio of 1 to 2 if n is 1).

REFERENCES:
patent: 5446017 (1995-08-01), Sakurai et al.
M. Azuma et al; "Superconductivity at 110 K in the infinite-layer compound . . . "; Apr. 30, 1992; pp. 775-776; Nature; vol. 356.
Adachi et al; "New superconducting cuprates in the Sr-Ca-Cu-O system"; 1993; pp. 164-168; Physica C. No Month.
Hiroi et al; "Probable hole-doped superconductivity without apical oxygens in (Ca, NA . . . "; Sep. 8, 1994; pp. 139-141; Nature; vol. 371.
Database WPI, Week 9224, Derwent Publications Ltd. London, GB; AN 92-196925 XP002007550 & JP-A-04 130 015 (Hitachi Ltd.), May 1, 1995 -Abstract.
Nature, vol. 375, May 25, 1995, pp. 301-303, C.-Q-Jin et al XP002007548.
Physica C., vol. 255, No. 1&2, Dec. 1, 1995, pp. 61-64, T. Tatsuki et al. -XP002007549.
Adachi et al. "High-Pressure synthesis of superconducting Sr-Ca-Cu-O samples" Physica C, 208(1993) pp.226-230. (No Month Available).

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