Abstract
Uniform irreversibility lines (ILs) and the morphology of nanorods independent of the growth temperature (Ts) were demonstrated by controlling the chemical compositions in superconducting REBa2Cu3Oy (RE123) matrix. Tailoring the composition ratios of Y and Er in an RE123 matrix using Ba–Nb–O-doped Y123 and Er123 films with opposite Ts-dependent ILs, almost constant ILs with a matching field of ∼4 T, and linear growth of nanorods were achieved in a wide Ts region of 40 °C (Ts=850–890 °C). The present study provides a novel strategy for the doping of nanorods in RE123-coated conductors with spatially uniform and high in-field critical current properties.
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