YBa 2 Cu 3 O 7-z superconducting coated conductors by chemical solution deposition approach

Abstract

YBa₂Cu₃O_7-δ (YBCO) superconducting coated conductors were prepared on SmBiO₃ (SBO) buffered substrates by chemical solution deposition approach. In this work, SBO buffer layers with a rapid decomposition process were heat treated less than 2 h. The SBO buffer layers deposited on LaAlO₃, yttria-stabilised zirconium and NiO-buffered NiW substrates possess pure SBO (l00) X-ray diffraction peaks and dense as well as smooth surface microstructures. And YBCO superconducting layers with c-axis texture and dense morphology were successfully fabricated on different SBO-buffered substrates, with superconducting transition temperature T_c of 90 K and critical current density (77 K, self-field) above 1 MA cm⁻². This could offer a promising alternative to low cost and high-performance preparation of YBCO superconducting coated conductors.