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US 5,106,823 AGranted
Josephson junctions made with thin superconductive layers
AssigneeThomson-CSF
InventorsGerard Creuzet, Jean-Pierre Hirtz
Life of this patent
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Abstract
A device made with thin layers comprises at least two layers of materials having different electrical characteristics. At least one of the layers is superconductive. The superconductive layer comprises a rare earth (or yttrium) which is chosen so as to confer superconductive characteristics. The other layer has a constitution which differs from that of the superconductive layer, solely by the fact that the rare earth is different and confers different electrical properties.
Claims8
A thin film superconducting device comprising:
- a first layer of single crystal high Tc superconductor with a crystal structure and a plurality of nonequivalent lattice sites therein and with a first face and a second face;
- a second layer with a first and second face, said first face of said second layer attached to said second face of said first layer wherein, said second layer is isostructural and epitaxial with said first layer;
- wherein, a plurality of first equivalent lattice sites in said first layer are occupied by an element of a first group consisting of Y, Yb, Tm, Er, Ho, Dy, Gd, Eu, and Sm, wherein a plurality of second equivalent lattice sites in said second layer exist which are crystallographically identical to said first equivalent lattice sites, said second equivalent lattice sites are occupied by a second atom selected from a member of a second group consisting of a combination of Y and Sc, and a combination of a rare earth and Sc.
Dependencies are inferred from the claim text.