Claims
- 1. A method for producing an at least partially covered superconductive material comprising:covering at least a portion of the superconductive material with a coating material, the coating material comprising calcium, barium, lanthanum, copper, oxygen, a rare earth metal, and a transition metal; wherein the coating material has a critical temperature of greater than about 40 K.
- 2. The method of claim 1, wherein the coating material comprises the formula R1−xCaxBa2−yLayCu3−zMzO7−δ, wherein R is a rare-earth element, M is a transition metal, 0<x≦0.4, 0<y≦0.4, 0<z<1.0, and δ≦1.
- 3. The method of claim 1, wherein the rare-earth element comprises La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or Y.
- 4. The method of claim 1, wherein the transition metal comprises Sc, La, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Os, Co, Rh, Ir, Ni, Pd, Pt, Ag, Au, Zn, Cd, or Hg.
- 5. The method of claim 1, wherein the superconductive material comprises YBa2Cu3O7−δ, Tl2Ba2Ca2Cu3O10, Bi2Sr2CaCu2O8, HgBa2Ca2Cu3O9, Tl2Ba2CaCu2O8, Bi2Sr2Ca2Cu3O10 or RBa2Cu3O7−δ, where R is a rare-earth element.
- 6. The method of claim 1, wherein the rare-earth metal comprises Pr or Gd, and wherein the transition metal comprises Co, Ni, or Zn.
- 7. The method of claim 1, wherein the coating material comprises the structure Gd0.6Ca0.4Ba1.6La0.4Cu3−vMvO7−δ where M is a transition metal, and where 0<v<1.
- 8. The method of claim 7, wherein the transition metal comprises Sc, La, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Os, Co, Rh, Ir, Ni, Pd, Pt, Ag, Au, Zn, Cd, or Hg.
- 9. The method of claim 7, wherein the transition metal comprises Ni, Co, or Zn and where 0<v<0.05.
- 10. The method of claim 1, wherein the coating material substantially reduces corrosion of the underlying superconductive material.
- 11. The method of claim 1, wherein the coating material substantially enhances conductivity of the underlying superconductive material when the material is exposed to magnetic fields having a strength between about 1 to about 10 T.
- 12. The method of claim 1, further comprising forming additional layers of superconductive material upon the coating material.
- 13. The method of claim 1, further comprising testing the conductivity of the superconductive material in the presence of a magnetic field.
PRIORITY CLAIM
This application claims the benefit of U.S. Provisional Application No. 60/096,689 entitled “Improved JC in High Field of Bi-Layer and Multi-Layer Structures For High Temperature Superconductive Materials,” filed Jul. 20, 1998.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Research leading to this invention was federally supported, in part, by grant no. N00014-94-1-0706 from the Office of Naval Research and the U.S. Government has certain rights to this invention.
US Referenced Citations (6)
Non-Patent Literature Citations (2)
Entry |
Zhou et al., “Improved N-layer materials for high-Tc superconductor/normal-metal/superconductor junctions and superconducting quantum interference device sensors,” Applied Physics Letters, vol. 72, No. 7, Feb. 1998, pp. 848-850. |
Bishop, David J., et al., “Resistance in High-Temperature Superconductors,” Scientific American, Feb. 1993, pp. 48-55. |
Provisional Applications (1)
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Number |
Date |
Country |
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60/096689 |
Jul 1998 |
US |