Robust critical current density in applied magnetic fields in 5 μm thick, SmBa2Cu3O7− based superconducting wires

Abstract

a b s t r a c tWe report the magnetic field and temperature dependence of the critical current density {J c (H) and J c (T)} flowing in a 5 lm thick sample of SmBa 2 Cu 3 O 7Àd (SmBCO) film. The film is a coated conductor (CC) deposited on an IBAD-MgO textured metallic template. For a range of intermediate fields, we find J c aH Àa with values of a between 0.44 and 0.49. These values are lower than those reported for other CC in the literature. The sample has a J c of 13.6 MA/cm 2 at 5 K and self-field. Such high-J c wires should find applications in large-scale energy applications of high-temperature superconductors. The temperature dependence of J c at self-field and different applied fields is also analyzed.