Chemical pinning centers for high temperature superconductors

Details Chemical pinning centers for high temperature superconductors Chemical pinning centers for high temperature superconductors

2006-04-11

2006-04-11

Kopec, Mark (Department: 1751)

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

C505S785000, C505S872000, C505S879000

Reexamination Certificate

active

07026271

ABSTRACT:
An oxide superconductor includes a textured superconducting material including an array of defects, where the defects are a compound of two elements foreign to the superconductor, plus other elements native to the superconductor. The two foreign elements include one from group A and one from group B (or alternately the two foreign elements include the element uranium and one element from group C), where group A includes Cr, Mo, W, or Nd, group B includes Pt, Zr, Pd, Ni, Ti, Hf, Ce and Th, and group C includes Zr, Pd, Ni, Ti, Hf, Ce and Th. The array of defects is dispersed throughout the superconducting material. The superconducting material may be the RE1Ba2Cu3O7−∂compound, wherein RE=Y, Nd, La, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, Tb; the Bi2Sr2CaCu2Ox, (Bi, Pb)2Sr2CaCu2Ox, Bi2Sr2Ca2Cu3Oxand (Bi, Pb)2Sr2Ca2Cu3Oxcompounds; the HgBa2Ca2Cu3O8and HgBa2CaCu2O6compounds, the TlCaBa2Cu2Oxor Tl2Ca2Ba2Cu3Oxcompounds and compounds involving substitution such as the Nd1+xBa2−xCu3Oxcompounds.

REFERENCES:
patent: 6083885 (2000-07-01), Weinstein
patent: 6869915 (2005-03-01), Weinstein
Muralidhar et al “Effects of Second Phase and platinum additions . . . ”, Applied Superconductivity (1998), vol. 4(10/11), 535-546.
Sawh et al, “Tungsten and molybdenum double perovskites as pinning centers . . . ”, Physica C: Superconductivity (2003) 383(4), pp 411-416.

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