Superconducting coil and superconducting device
AssigneeKabushiki Kaisha Toshiba
InventorsTakeshi Araki, Kenji Tasaki, Hirotaka Ishii
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Abstract
A superconducting coil of an embodiment includes a superconducting wire including an oxide superconductor layer. The oxide superconductor layer has a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
Claims17
A superconducting coil comprising a superconducting wire including an oxide superconductor layer,
- the oxide superconductor layer having a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu),
- the rare earth elements include a first element, at least one second element, at least one third element, and at least one fourth element, the first element being praseodymium (Pr), the at least one second element being selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), the at least one third element being selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and the at least one fourth element being selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu), and
- the oxide superconductor layer comprising a first area and a second area, when brightness of barium in a HAADF-STEM (High-Angle Annular Dark Field Scanning Transmission Electron Microscopy) image being represented by I(Ba) and brightness in the HAADF-STEM image of an rare earth element sandwiched by barium being represented by I(RE), I(RE)/I(Ba) in the first area being 1.3 times or more I(RE)/I(Ba) in the second area.
A superconducting coil comprising a superconducting wire including an oxide superconductor layer,
- the oxide superconductor layer having a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu),
- the rare earth elements including a first element, at least one second element, and at least one third element, the first element being praseodymium (Pr), the at least one second element being selected from the group consisting of gadolinium (Gd), yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and the at least one third element being selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu), and
- the oxide superconductor layer comprising a first area and a second area, when brightness of barium in a HAADF-STEM (High-Angle Annular Dark Field Scanning Transmission Electron Microscopy) image being represented by I(Ba) and brightness in the HAADF-STEM image of an rare earth element sandwiched by barium being represented by I(RE), I(RE)/I(Ba) in the first area being 1.3 times or more I(RE)/I(Ba) in the second area.
Dependencies are inferred from the claim text.