Fabrication of YBCO Film Using a New Copper Precursor by Chemical Solution Method

YBCO films were fabricated by using a modified precursor solution, which was prepared by mixing yttrium trifluoroacetate, barium trifluoroacetate, and a fluorine-free copper precursor. Crack-free films have been obtained in a rapid pyrolysis process. The texture, microstructure and superconducting properties of films were characterized by x-ray diffraction, scanning electron microscopy, and the inductive method, respectively. The effect of the heating rate on the phase formation, texture and critical properties ( J c ) of YBCO films was investigated. The texture and critical current density varied significantly with the heating rate. Moreover, the J c of 1.7 MA/cm 2 was obtained for YBCO films prepared at the heating rate of 3 K/min.