(Ba, Ca).sub.x (.alpha., Dy).sub.1-x Tl.sub.y Cu.sub.1-Y O.sub.3

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k


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252521, 423604, 423624, 423635, 501123, 501126, 505783, C01F 1102, C01F 1700, C01G 302, H01L 3912




A superconducting material and a process for producing a superconducting material comprising a compound oxide represented by the general formula:

patent: 4962083 (1990-10-01), Hermann
Hasegawa "High Tc Superconductivity of (La.sub.1-x Sr.sub.x).sub.2 CuO.sub.4 . . . ", Jap. Jnl. Appl. Phys. vol. 26(4), Apr. 1987 pp. L337-L338.
Kishio "High-Tc Superconducting Oxide Solid Solutions . . . ", Chemistry Letters No. 4, Apr. 1987, pp. 635-638.
Murphy "New Superconducting Cuprate Perouskites", Phys. Rev. Lett. vol. 58(18) May 4, 1987 pp. 1888-1890.
Dong "Superconductivity and Crystal Structure of LaBa.sub.2-x Ca.sub.x Cu.sub.3 O.sub.7 ", Modern Phys. Letts. vol. 1 (7+8) 1987, pp. 295-302.
Koinuma "Preparation of (La.sub.1-x Sr.sub.x).sub.2 CuO.sub.4-8 Superconducting Films . . . ", Jap. Jnl. Appl. Phyl. vol. 26(4) Apr. 1987 pp. L399-L401.
Sheng, Z. Z. et al., "Superconductivity in the Rare-Earth-Free Tl-Ba-Cu-O System Above Liquid Nitrogen Temperature"; Nature, Mar. 3, 1988, pp. 55-58.
Sheng et al., "Bulk Superconductivity at 120K in the Tl-Ca/Ba-Cu-O System", Nature, Mar. 10, 1988, pp. 138-139.
Gao et al., "Bulk Superconductivity in Tl.sub.2 CaBa.sub.2 Cu.sub.2 O Up to 120K", Nature, Apr. 14, 1988, pp. 623-624.
Sheng et al., "Superconductivity at 90K in the Tl-Ba-Cu-O System", Phys. Rev. Lett., vol. 60, No. 10, 1988, pp. 937-940.
Hazen et al., "100-K Superconducting Phases in the Tl-Ca-Ba-Cu-O System", Phys. Rev. Lett., vol. 60, No. 16, Apr. 18, 1988, pp. 1657-1660.
Sheng et al., "New 120K Tl-Ca-Ba-Cu-O Superconductor", Appl. Phys. Lett., May 16, 1988, pp. 1738-1740.


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