High temperature superconductor having low superconducting anisotropy and method for producing the superconductor
AssigneeAgency of Industrial Science & Technology, Ministry of International Trade & Industry
InventorHideo Ihara
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Abstract
A high-temperature superconductor having low superconducting anisotropy includes a two-dimensional layered structure of crystal unit cells each consisting of a pair of superconducting layer and charge reservoir layer. At least a portion of the atoms of the charge reservoir layer are replaced by atoms giving superconductivity, rendering the charge reservoir layer superconducting and lowering the superconducting anisotropy by increasing the coherence length in the thickness direction.
Claims4
A high-temperature superconductor having predetermined superconducting anisotropy comprising a two-dimensional layered structure of crystal unit cells each of said unit cells constituted by a pair of superconducting layer and charge reservoir layer provided perpendicularly on the superconducting layer, wherein at least a portion of atoms comprising the charge reservoir layer is replaced by atoms giving superconductivity, thereby metallizing or rendering the charge reservoir layer superconducting, and the superconducting layer comprises 3 to 16 layers and has a coherence length of 0.64 to 4.80 nm in a thickness direction, based on the uncertainty principle and has a superconducting transition temperature of 118 to 126K, thereby lowering superconducting anisotropy to the range of from less than 4 to close to 1.
Dependencies are inferred from the claim text.