Thermoelectric radiation detectors based on perovskite doped films and superlattices
AssigneeMax-Planck-Gesselschaft
InventorsHanns-Ulrich Habermeier, Gerold Jager-Waldau, Bernd Leibold, Najeh Jisrawi
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Abstract
A thermoelectric radiation detector having a substrate (1) and a film (2) of solid state material having thermal anisotropy and containing YBa.sub.2 Cu.sub.3 O.sub.7, formed on the surface of the substrate, and wherein said film has CuO.sub.2 planes (3) inclined with respect to the substrate plane, the improvement wherein at least a portion of the Y is replaced by another rare earth metal and/or at least a portion of the Ba and/or of the Cu is replaced by at least one other heavy metal at least in partial areas of the film and in a sufficient amount to increase the thermal anisotropy of the detector.
Claims16
In a thermoelectric radiation detector having a substrate (1) and a film (2) of solid state material having thermal anisotropy and containing YBa.sub.2 Cu.sub.3 O.sub.7, formed on the surface of the substrate, and wherein said film has CuO.sub.2 planes (3) inclined with respect to the substrate plane, the improvement 2-40% Y is replaced by Pr to increase the thermal anisotropy of the detector.
A thermoelectric radiation detector having a substrate (1) and a film (2) of Bi.sub.m Ca.sub.n-1 Sr.sub.n Cu.sub.n O.sub.2n+m+2 formed on the surface of the substrate, in the said film of which the CuO.sub.2 planes (3) are inclined with respect to the substrate plane, wherein the concentration factors n and ml n, m are 2.2 or 3,2 respectively such that the anisotropy in the thermoelectric force is a maximum.
A thermoelectric radiation detector having a substrate and a film of a crystalline solid-state material having anisotropic thermoelectric force formed on the surface of the substrate, the surface normal of said film not coinciding with one of the main anisotropic directions, wherein said film is configured as a superlattice of an alternating sequence of layers of materials C and D, said material C being a perovskite-type oxidic material, and said material D being Y.sub.(1-x) Pr.sub.x Ba.sub.2 Cu.sub.3 O.sub.7.
Dependencies are inferred from the claim text.