Epitaxial YBa(sub 2)Cu(sub 3)O(sub 7) on biaxially textured (001) Ni: An approach to high critical current density superconducting tapes

摘要

In-plane aligned, c-axis oriented YBa(sub 2)Cu(sub 3)O(sub 7) (YBCO) films with superconducting critical current densities, J(sub c), as high as 700,000 amperes per square centimeter at 77 kelvin have been grown on thermo-mechanically, rolled-textured (001) Ni tapes using pulsed-laser deposition. Epitaxial growth of oxide buffer layers directly on biaxially textured Ni, formed by recrystallization of cold-rolled pure Ni, enables the growth of 1.5 micrometer-thick YBCO films with superconducting properties that are comparable to those observed for epitaxial films on single crystal oxide substrates. This result represents a viable approach for producing long-length superconducting tapes for high current, high field applications at 77 kelvin.