Y-Ba-Cu-O superconductor containing radioactive dopants

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

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423251, 423260, 264 65, 264 66, 501126, 501152, 505781, 505785, 252517, H01B 1200

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active

049961926

ABSTRACT:
A polycrystalline Y-Ba-Cu-O superconductor doped with sufficient .sup.235 U and/or .sup.239 Pu atoms is irradiated with thermal neutrons to produce from about 2.5.times.10.sup.14 to about 50.times.10.sup.14 fission events per cubic centimeter of superconductor.

REFERENCES:
patent: 3310395 (1967-03-01), Swartz et al.
patent: 3346425 (1967-10-01), Fleischer
Sherwood et al., Superconducting Properties of YBa.sub.2 Cu.sub.3 O.sub.7-8 Doped with Various Metal & Oxides, 1988, Mat. Res. Soc. Symp. Proc., vol. 99, pp. 503-506.
Horowitz et al., Effect of Ambient Atmosphere on YBa.sub.2 Cu.sub.3 O.sub.7-y, 1988, Mat. Res. Soc. Symp. Proc., vol. 99, pp. 903-906.
Togano et al., Structure and Superconducting Properties of High-T Oxide Superconductors Prepared by Liquid Quenching, MRS Int'l , Meeting on Advanced Materials, Sunshine City, Ikebukuro, Kokyo, Japan, May 30-Jun. 3-1988.
Fleischer et al., "Increased Flux Pinning Upon Thermal-Neutron Irradiation of Uranium-Doped YBaCu-3O-7", Gen. Elec. Technical Report No. 89CRD047 (Apr. 1989), 18 pp.
Swartz et al., "Effect of Fast-Neutron Irradiation of Magnetic Properties and Critical Temperature of Some Type II Superconductors", Applied Physics Letters, vol. 4 (Feb. 1964), pp. 71-73.
Bean et al., "Effect of Thermal-Neutron Irradiation on the Superconducting Properties of Nb-3Al and V-3Si Doped with Fissionable Impurties", J. Appl. Phys. 37 (1966), pp. 2218-2224.
Umezawa et al., "Enhanced Critical Magnetization Currents Due to Fast Neutron Irradiation in Single-Crystal YBa-2Cu-3O-7-.delta.", Phys. Rev. B-36 (1987), pp. 7151-7154.
Willis et al., "Radiation Damage in YBa-2Cu-3O-7 by Fast Neutrons", MRS Meeting, Boston, (Dec. 1987), 4 pp.
Fleischer et al., "Ion Explosion Spike Mechanism for Formation of Charged-Particle Tracks in Solids", J. App. Phys. 36 (1965), pp. 3645-3652.

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