Superconductor
OwnerShinichiro Hatta, Hidetaka Higashino +2inventors
InventorsShinichiro Hatta, Hidetaka Higashino, Kumiko Hirochi, Hideaki Adachi
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Abstract
Excellent films of a high Tc superconductor are easily produced on metal coated substrates at a temperature below 700.degree. C. These metal buffer films are made of Pt, Au, Ag, Pd, Ni or Ti. The film superconductivity is significantly improved by the metal buffer layer. Since it is easy to form this metal coating on a substrate, the invention can increase the potential number of usable substrates such as fibers, amorphous solids or semiconductors.
Claims18
A superconductor comprising an A--B--Cu oxide film deposited on a metal film formed on a substrate, said A--B--Cu oxide containing elements A and B and Cu and O, the molar ratio of said elements A and B and Cu being in a range of ##EQU4## wherein the element A is one element selected from Tl, Bi, Pb, Y and lanthanum series elements (atomic number:
- 57-71), and the element B is one element selected from the Group IIa elements;
- and said metal film being a transition metal element selected from Pt, Au, Ag, Pd, Ni and Ti the composition A--B--Cu--O of said oxide film being in the form of layered perovskite-like structure.
An article comprising:
- (a) a substrate
- (b) a noble metal buffer layer selected from the group consisting of silver and gold formed on said substrate
- (c) a high temperature superconductor layer consisting of Y--Ba--Cu--O formed on said buffer layer.
An article comprising:
- (a) a substrate
- (b) a metal buffer layer selected from the group consisting of nickel, palladium, platinum, gold, silver and titanium formed on said substrate
- (c) a high temperature superconductor layer consisting of a high temperature superconducting layer formed on the buffer layer.
Dependencies are inferred from the claim text.