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).

An oxide superconductor of an embodiment includes an 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 which is praseodymium, at least one second element selected from the group consisting of neodymium, samarium, europium, and gadolinium, at least one third element selected from the group consisting of yttrium, terbium, dysprosium, and holmium, and at least one fourth element selected from the group consisting of erbium, thulium, ytterbium, and lutetium. When the number of atoms of the first element is N(PA), the number of atoms of the second element is N(SA), and the number of atoms of the fourth element is N(CA), 1.5(N(PA)+N(SA))N(CA) or 2(N(CA)N(PA))N(SA) is satisfied.

An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain 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).

Solid-state devices including a layer of a superconductor material epitaxially grown on a crystalline high thermal conductivity substrate, the superconductor material being one of TiNx, ZrNx, HfNx, VNx, NbNx, TaNx, MoNx, WNx, or alloys thereof, and one or more layers of a semiconducting or insulating or metallic material epitaxially grown on the layer of superconductor material, the semiconducting or insulating material being one of a Group III N material or alloys thereof or a Group 4b N material or SiC or ScN or alloys thereof.

A configuration and a method of constructing a high-temperature superconductor tape including a plurality superconducting filaments sandwiched between a substrate and an overlayer comprising compliant material extending to the substrate through gaps between each superconducting filament thereby isolating each superconducting filament.

A composition comprises a plurality of continuous ordered fibers embedded in a high temperature superconducting material, wherein the plurality of continuous ordered fibers comprise a core and a reinforcing material. A composition comprises one or more large diameter continuous fibers embedded in a high temperature superconducting material; and one or more small diameter continuous fibers embedded in a high temperature superconducting material. A composition comprising one or more continuous fibers embedded in a high temperature superconducting material, wherein a fiber of the one or more continuous fibers comprise a core and reinforcing material, and wherein one or more magnetic particles are embedded in the core of the fiber.

A method comprises growing a longitudinal a-b plane high temperature superconducting crystal with a long fiber reinforced seed crystal; and cutting off the long fiber reinforced seed crystal from the longitudinal a-b plane high temperature superconducting crystal. A method comprises adding high temperature superconducting constituent powders; adding intermediate solid state powders to the constituent powders; disposing fiber reinforcement within the intermediate solid state powders and the constituent powders; compressing the intermediate solid state powders and the constituent powders with the fiber reinforcement to form a high temperature superconducting shape; and heating the high temperature superconducting shape to crystalize. A composition comprises a plurality HTS segments, wherein a HTS segment comprises one or more continuous fibers embedded in a high temperature superconducting material; and a wire or a tape, which is mechanically and electrically coupled between a first HTS segment and a second HTS segment.

A method, system, and apparatus for fabricating a high-strength Superconducting cable comprises pre-oxidizing at least one high-strength alloy wire, coating at least one Superconducting wire with a protective layer, and winding the high-strength alloy wire and the Superconducting wire to form a high-strength Superconducting cable.

Methods and devices involving 2212 multifilament superconducting wire with resistance sleeves. More specifically, methods and devices including high resistance sleeves around individual, unmerged filaments or filament bundles, with axial twist, and with round or rectangular wire shape for lower losses in and ramped fields.

A bundle of superconducting cables employs a plurality of superconducting cables, each having a former and a plurality of superconducting tape conductors wound in at least one layer around the former in a helical fashion. Each superconducting tape conductor has at least one superconducting layer. Each superconducting cable lacks an outer insulating layer and is held in a bundle of cables with each other superconducting cable of the plurality of superconducting cables. A sheath of non-conductive material covers the bundle of cables.