Chemical pinning centers for high temperature superconductors

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

2005-03-22

2005-03-22

Kopec, Mark (Department: 1751)

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Producing lattice imperfection flux pinning sites or...

C505S120000, C505S121000, C505S126000

Reexamination Certificate

active

06869915

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−δcompound, wherein RE=Y, Nd, La, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, Tb; the Bi2Sr2CaCu2Ox, (Bi, Pb)2Sr2CaCu2Ox, Bi2Sr2Ca2Cu3Ox(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: 6525002 (2003-02-01), Weinstein
Sawh et al “Uranium chemistry and pinning centers in high temperature superconductor” Physica C., 305, 159-166 (1998).

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