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AssigneeAgency of Industrial Science & Technology, Ministry of International Trade & Industry
InventorsHideo Ihara, Shyam Kishore Agarwal
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A Mg-doped high-temperature superconductor having low superconducting anisotropy includes a two-dimensional layered structure constituted by a charge reservoir layer and a superconducting layer, wherein some or all atoms constituting the charge reservoir layer are Cu and O atoms, metallizing or rendering the charge reservoir layer superconducting, a portion of the Ca of the CunCan−1O2n constituting the superconducting layer is replaced by Mg, increasing superconductive coupling between CuO2 layers, a thickness of the superconducting layer is increased, and therefore coherence length in a thickness direction is increased based on the uncertainty principle, lowering superconducting anisotropy.
A Mg-doped high-temperature superconductor, comprising a two dimensional layered structure constituted by a charge reservoir layer and a superconducting layer, wherein some or all atoms comprising the charge reservoir layer are Cu and O atoms, metallizing or rendering the charge reservoir layer superconducting, and a portion of Ca of CunCan−1O2n constituting the superconducting layer is replaced by Mg, and comprises a copper oxide superconductor having a composition expressed by a formula Cu1−xMx(Ba1−ySry)2(Ca1−zMgz)n−1CunO2n+4−w (in which M is at least one selected from a group consisting of Tl, Hg, Bi, Pb, Au, In, Sn, Mg, Ag, Mo, Re, Os, Cr, V, Fe, and lanthanide elements, 0≦x<1, 0≦y<1, 0<z<1, 0≦w≦4,and 3≦n≦16).
A Mg-doped high-temperature superconductor, comprising a two-dimensional layered structure constituted by a charge reservoir layer and a superconducting layer, wherein some or all atoms comprising the charge reservoir layer are Cu and O atoms, metallizing or rendering the charge reservoir layer superconducting, and a portion of Ca of CunCan−1O2n constituting the superconducting layer is replaced by Mg, and comprises a copper oxide superconductor having a composition expressed by a formula Cu1−xMx(Ba1−ySry)2(Ca1−zMgz)n−1CunO2n+4−w (in which M is at least one selected from a group consisting of Tl, Hg, Pb, In, Sn, Mg, Ag, Mo, Cr, V, and Fe, 0≦x<1, 0≦y<1, 0<z<1, 0≦w≦4,and 3≦n≦16).
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