Superconductor flux pinning without columnar defects
AssigneeMetOx International, Inc.
InventorsMikhail Novozhilov, Alex Ignatiev
Life of this patent
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Abstract
There is a superconducting article that includes a superconducting film comprising a substrate, one or more buffer layers, and a high temperature superconducting (HTS) layer. The superconducting layer may be comprised of the chemical composition REBa2Cu3O7−x, where RE is one or more rare earth elements, for example: Y, La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. The superconductor layer is produced using Photo-Assisted Metal Organic Chemical Vapor Deposition (PAMOCVD) and contains non-superconducting nanoparticles. The nanoparticles are substantially provided in the a-b plane and naturally oriented. The non-superconducting nanoparticles provide flux pinning centers that improve the critical current properties of the superconducting film.
Claims19
A thin film composite high-temperature superconducting article comprising:
- a substrate;
- a buffer layer;
- and
- a high-temperature superconducting layer,
- wherein the high-temperature superconducting layer further comprises non-superconducting material distributed along the a-b plane coplanar with the superconducting layer and without distribution along the c-axis such that the non-superconducting material lacks a substantial vertically oriented component.
A method of forming a high-temperature superconductor, the method comprising
- providing a substrate;
- depositing a buffer layer upon the substrate;
- depositing a high-temperature superconducting layer upon the buffer layer;
- and
- co-depositing a non-superconducting material distributed preferentially along the a-b plane coplanar with the superconducting layer, wherein the non-superconducting material is randomly distributed and lacks a substantial vertically oriented component.
A thin film composite high-temperature superconducting article comprising:
- a substrate;
- a buffer layer;
- a high-temperature superconducting layer;
- non-superconducting material distributed preferentially along the a-b plane coplanar with the superconducting layer and without distribution along the c-axis such that the non-superconducting material lacks a substantial vertically oriented component;
- and
- a lift factor at 4K, 20T (Ic (4K, 20T)/Ic (77K, self-field)) of 2 or greater.
Dependencies are inferred from the claim text.