All chemical solution deposition of textured YBa₂Cu₃O_7−x/Y_0.2Ce_0.8O₂/La₂Zr₂O₇ multilayer films on biaxially textured NiW tape

Biaxially textured La₂Zr₂O₇ (LZO) single buffer layer, Y_0.2Ce_0.8O₂ (YCO) single buffer layer, and YCO/LZO bilayer buffer layer are prepared on NiW tapes using chemical solution deposition technique. All the buffer layers are of good in-plane and out-of-plane texture. The introduction of a YCO cap layer on the LZO buffer layer improves the surface quality of the films. YBa₂Cu₃O_7−x (YBCO) films are then prepared on these buffer layers using our recently developed low-fluorine solution route. Purely c-oriented YBCO films with good in-plane and out-of-plane texture are obtained on the YCO/LZO bilayer buffer layers. The YBCO/YCO/LZO/Ni stack prepared using all chemical solution routes shows a high T_c over 90 K, a sharp transition temperature ΔT = 0.8 K, and a J_c of 0.7 MA cm⁻²(at 77 K, 0T). (paper)