Patent number: 6221812
Abstract: To improve the chemical stability, as well as the critical current density (JC) of a superconductive material in an external magnetic field, copper-oxide coating materials have been developed. In some embodiments, these coating materials include a composition with the formula R1−xCaxBa2−yLayCu3−zMzO7−&dgr;, where R is a rare-earth element (e.g., La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or Y), M is a transition metal (e.g., Mn, Re, Fe, Os, Co, Rh, Ir, Ni, Pd, Pt, Ag, Au, Zn, Cd, or Hg), 0≦x≦0.4, 0≦y≦0.4, and 0≦z≦1.0.
Type:
Grant
Filed:
July 20, 1999
Date of Patent:
April 24, 2001
Assignee:
Board of Regents, The University of Texas System
Inventors:
JiPing Zhou, John T. McDevitt, John B. Goodenough
