Strongly enhanced irreversibility field and flux pinning force density in SmBa2Cu3Oy-coated conductors with well-aligned BaHfO3 nanorods

摘要

A high flux pinning performance was obtained for a 3.8 vol% BaHfO3-doped SmBa(2)Cu(3)Oy superconducting film on a metallic substrate. At a temperature of 77.3 K, an irreversibility field of 16.8 T and the maximum flux pinning force density of 32.5GN/m(3) in fields applied parallel to the c-axis of the film were achieved, which are the highest values reported thus far for REBa(2)Cu(3)Oy films, to our knowledge. The introduction of wellaligned BaHfO3 nanorods with a high number density into REBa(2)Cu(3)Oy films with little or no degradation of the critical temperature is an effective method for improving the flux pinning performance. (C) 2017 The Japan Society of Applied Physics