An oxide superconductor according to an embodiment includes an oxide superconducting layer includes a single crystal having a continuous perovskite structure containing at least one rare earth element selected from the group consisting of yttrium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, barium, and copper, containing praseodymium in a part of the site of the rare earth element in the perovskite structure, and having a molar ratio of praseodymium of 0.00000001 or more and 0.2 or less with respect to the sum of the at least one rare earth element and praseodymium; fluorine in an amount of 2.0×10.sup.15 atoms/cc or more and 5.0×10.sup.19 atoms/cc or less; and carbon in an amount of 1.0×10.sup.17 atoms/cc or more and 5.0×10.sup.20 atoms/cc or less.

A composition comprises one or more continuous fibers embedded in a high temperature superconducting material.

A superconducting material includes YBa.sub.2Cu.sub.3O.sub.7-δ and a nano-structured, preferably nanowires, WO.sub.3 dopant in a range of from 0.01 to 3.0 wt. %, preferably 0.075 to 0.2 wt. %, based on total material weight. Methods of making the superconductor may preferably avoid solvents and pursue solid-state synthesis employing Y, Ba, and/or Cu oxides and/or carbonates.

A superconducting material includes YBa.sub.2Cu.sub.3O.sub.7-δ and a nano-structured, preferably nanowires, WO.sub.3 dopant in a range of from 0.01 to 3.0 wt. %, preferably 0.075 to 0.2 wt. %, based on total material weight. Methods of making the superconductor may preferably avoid solvents and pursue solid-state synthesis employing Y, Ba, and/or Cu oxides and/or carbonates.

A superconducting article includes a substrate and a superconducting metal oxide film formed on the substrate. The metal oxide film including ions of an alkali metal, ions of a transition metal, and ions of an alkaline earth metal or a rare earth metal. For instance, the metal oxide film can include Rb ions, La ions, and Cu ions. The superconducting metal oxide film can have a critical temperature for onset of superconductivity of greater than 250 K, e.g., greater than room temperature.

The present disclosure relates generally to wires and more particularly to textured powder wires containing nanoscale metallic silver powder. The invention presents an improvement of the process of making compressed cores of textured-powder high-temperature superconductor previously using the micaceous high-temperature superconductor Bi-2212. Embodiments of the claimed methods are useful with the micaceous high-temperature superconductors, notably Bi2Sr2CaCu208+x (Bi-2212) and Bi2Sr2Ca2Cu3O10+x (Bi-2223) and rare earth barium copper oxide (REBCO).

An oxide superconductor according to an embodiment includes an oxide superconducting layer includes a single crystal having a continuous perovskite structure containing at least one rare earth element selected from the group consisting of yttrium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, barium, and copper, containing praseodymium is a part of the site of the rare earth element in the perovskite structure, and having a molar ratio of praseodymium of 0.00000001 or more and 0.2 or less with respect to the sum of the at least one rare earth element and praseodymium; fluorine in an amount of 2.010.sup.15 atoms/cc or more and 5.010.sup.19 atoms/cc or less; and carbon in an amount of 1.010.sup.17 atoms/cc or more and 5.010.sup.20 atoms/cc or less.

The present invention relates to a superconducting nanowire single-photon detector, which can include a superconducting nanowire configured and arranged for the incidence of a photon on a region thereof and the formation, on that region, of a localized non-superconducting region or hotspot.

The superconducting nanowire is made of a high-Tc cuprate superconductor material having a superconducting critical temperature above 77 K.

The present invention also relates to a method for obtaining the superconducting nanowire single-photon detector of the present invention.

Superconducting interconnects with ultra-low thermal conductivity capable of providing a direct connection between a millikelvin temperature environment and a 70 K temperature environment.

Techniques regarding shielding one or more superconducting devices are provided. For example, one or more embodiments described herein can comprise an apparatus, which can comprise a multi-layer enclosure that shields a superconducting device from a magnetic field and radiation. Further, the multi-layer enclosure can comprise a superconducting material layer that can have a thickness that inhibits a penetration of the multi-layer enclosure by the magnetic field. The multi-layer enclosure can also comprise a metal layer adjacent to the superconducting material layer. The metal layer can have a high thermal conductivity that achieves thermalization with the superconducting material layer. Moreover, the multi-layer enclosure can comprise a radiation shield layer adjacent to the superconducting material layer.