Tl-doped HgBaCaCu superconductors

Details Tl-doped HgBaCaCu superconductors Tl-doped HgBaCaCu superconductors

1994-05-31

1996-09-17

McGinty, Douglas J.

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

505126, 505120, 505501, 505783, 252521, 501123, H01L 3912, C04B 3500, C04B 3545, C04B 35057

Patent

active

055568300

ABSTRACT:
Improved superconducting oxides are provided having the general formula (Hg.sub.1-x Tl.sub.x)Ba.sub.2 Ca.sub.n-1 Cu.sub.n O.sub.2n+2+.alpha. where x is from about 0.05-0.5 and n is 1, 2, 3 or 4, and .alpha. is an oxygen enrichment factor. The Tl-doped oxides exhibit very high T.sub.c and J.sub.c values.

REFERENCES:
patent: 5300482 (1994-04-01), Doi et al.
Meng et al.; Synthesis of the High-Temperature Superconductors HgBa.sub.2 CaCu.sub.2 O.sub.6+.delta. and HgBa.sub.2 Ca.sub.2 Cu.sub.3 O.sub.8+.delta., Physica, C216 (1993) 21-28 month not known.
Sun, G. F., et al., "T.sub.c Enhancement of HgBa.sub.2 Ca.sub.2 Cu.sub.3 O.sub.8+ by Tl Substitution", Physics Letter A, 192(1) (29 Aug. 1994), 122-4.
Goutenoire, F., et al., "Substitution of Mercury for Thallium in the 2223-Cuprate: The 130K-Superconductor Tl.sub.1.6 Hg.sub.0.4 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.10-x ", Solid State Communications, 90(1) (Apr. 1994), 47-50.
Gupta, Raju P., et al., "Mechanism of hole doping in Hg-based cuprate superconductors", Physica C, 223 (Nos. 3 & 4) (10 Apr. 1994), 213-218.
Xin Y., et al., "Optimum preparation and elemental addition for Tl-based 2223 phase Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.10-.delta. ", Physica C, 184 (Nos. 1-3) (1 Dec. 1991), 185-189.

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