Superconductivity in square-planar compound systems

Details Superconductivity in square-planar compound systems Superconductivity in square-planar compound systems

2006-06-06

2006-06-06

Kopec, Mark (Department: 1751)

Superconductor technology: apparatus, material, process

High temperature , per se

Copper containing

C505S126000, C505S490000, C505S500000, C505S780000

Reexamination Certificate

active

07056866

ABSTRACT:
Described is a superconducting composition comprising an oxide complex of the formula [L1−xMx]aAbOywherein L is lanthanum, lutetium, yttrium, or scandium; A is copper, bismuth, titanium, tungsten, zirconium, tantalum, niobium, or vanadium; M is barium, strontium, calcium, magnesium or mercury; and “a” is 1 to 2; “b” is 1; and “x” is a number in the range of 0.01 to 1.0; and “y” is about 2 to about 4. The oxide complexes of the invention are prepared by a solid-state reaction procedure which produces an oxide complex having an enhanced superconducting transition temperature compared to an oxide complex of like empirical composition prepared by a coprecipitation—high temperature decomposition procedure. With an oxide complex prepared by the solid-state reaction of the invention a transition temperature as high as 100°K has been observed even under atmospheric pressure.

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