METHOD FOR PRODUCING MULTILAYER HIGH-TEMPERATURE SUPERCONDUCTING MATERIAL Russian patent published in 2017 - IPC H01L39/24 

FIELD: technological processes.

SUBSTANCE: invention relates to the field of technologies for the production of epitaxial oxide superconducting coatings on a metal substrate previously coated with a biaxially textured oxide layer and buffer oxide layers or on a biaxially textured metal substrate previously coated with oxide buffer layers and can be used to produce the second generation superconducting wires. The method for producing a multilayer high-temperature superconducting material comprises applying to, at least, one epitaxial oxide buffer layer from a precursor produced from a sol of oxide and hydroxide nanoparticles of selected elements in an aqueous solution of a temperature-dependent polymer, by heating at a temperature above the phase transition temperature of the temperature-dependent polymer. The sol of the oxide and hydroxide nanoparticles of the selected elements is pretreated for 100 or more seconds in an alternating rotating magnetic field with an amplitude of not more than 0.10 T and a frequency (10-40) Hz followed by heat treatment of the buffer layer and deposition one epitaxial layer of a superconducting material on the buffer layer, at least, and its heat treatment.

EFFECT: producing a multilayer high-temperature superconducting material with an improved crystal structure of epitaxial buffer layers produced from precursors in the form of hydrosols of oxide or hydroxide nanoparticles.

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