Epitaxial YBa 2 Cu 307 on Biaxially Textured Nickel ( 001 ) : An Approach to Superconducting Tapes with High Critical Current Density
semanticscholar(2013)
摘要
In-plane-aligned, c axis-oriented YBa2Cu307 (YBCO) films with superconducting critical current densities Jc as high as 700,000 amperes per square centimeter at 77 kelvin have been grown on thermomechanically rolled-textured nickel (001) tapes by pulsedlaser deposition. Epitaxial growth of oxide buffer layers directly on biaxially textured nickel, formed by recrystallization of cold-rolled pure nickel, made possible the growth of YBCO films 1.5 micrometers thick with superconducting properties that are comparable to those observed for epitaxial films on single-crystal oxide substrates. This result represents a viable approach for the production of long superconducting tapes for high-current, high-field applications at 77 kelvin.
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