CRITICAL CURRENT DENSITY ENHANCEMENT VIA INCORPORATION OF NANOSCALE Ba2(Y,RE)TaO6 IN REBCO FILMS
OwnerAmit Goyal, Claudia Cantoni +2inventors
InventorsAmit Goyal, Claudia Cantoni, Eliot Specht, Sung-Hun Wee
Life of this patent
Estimating the term…
Abstract
A superconducting article includes a substrate having a biaxially textured surface, and an epitaxial biaxially textured superconducting film supported by the substrate. The epitaxial superconducting film includes particles of Ba2RETaO6 and is characterized by a critical current density higher than 1 MA/cm2 at 77K, self-field. In one embodiment the particles are assembled into columns. The particles and nanocolumns of Ba2RETaO6 defects enhance flux pinning which results in improved critical current densities of the superconducting films. Methods of making superconducting films with Ba2RETaO6 defects are also disclosed.
Claims20
An article comprising a substrate having a biaxially textured surface, and an epitaxial biaxially textured superconducting film supported by said substrate, said epitaxial superconducting film comprising nanoparticles of double perovskite, Ba2RETaO6 and being characterized by a critical current density higher than 1 MA/cm2 at 77K, self-field.
A method of making a superconducting article comprising a biaxially textured superconducting material and characterized by a critical current density higher than 1 MA/cm2 at 77K, self-field, said method comprising the steps of (a) providing a buffered biaxially textured or single crystal substrate and (b) performing simultaneous deposition of the biaxially textured superconducting material and nanoparticles of double perovskite Ba2RETaO6.
A method of making a superconducting film comprising a biaxially textured superconducting materialand characterized by a critical current density higher than 1 MA/cm2 at 77K, self-field, said method comprising the steps of:
- (a) providing a buffered biaxially textured or single crystal substrate (b) heating the substrate to a preselected deposition temperature under a preselected gas atmosphere and pressure (c) performing simultaneous deposition of the biaxially textured superconducting material and nanoparticles of double perovskite Ba2RETaO6.
A method in accordance with claim 13 wherein the simultaneous deposition is done using an in-situ deposition process selected from the group consisting of pulsed laser ablation, chemical vapor deposition (CVD), metal organic chemical vapor deposition (MOCVD), sputtering and e-beam co-evaporation.
A superconducting article comprising a biaxially textured superconducting composition containing RE, Ba, Cu and O and nanoparticles of double perovskite, Ba2(Y,RE)TaO6 and being characterized by a critical current density higher than 1 MA/cm2 at 77K, self-field.
Dependencies are inferred from the claim text.