High performance GdBa2Cu3O7−z film preparation by non-fluorine chemical solution deposition approach

Biaxially textured GdBa2Cu3O7−z (GdBCO) films with Tc above 93 K have been prepared on (0 0 l) LaAlO3 substrate by self-developed non-fluorine polymer-assisted chemical solution deposition (PA-CSD) approach. The GdBCO films show smooth and crack-free morphology. Many nanoscale particles with homogeneous distribution are observed in the GdBCO films, which have not been observed yet in the YBa2Cu3O7−z (YBCO) films prepared by the same processing technique. Besides a high Jc (77 K, 0 T) of 2.28 MA/cm2, the optimized GdBCO films show a better Jc–B behavior and an improved high-field Jc, compared to the YBCO films.

► Biaxially textured GdBa2Cu3O7-z films with Tc above 93 K have been prepared on (0 0 l) by non-fluorine CSD approach. ► Nanoparticles with homogeneous distribution are introduced into the GdBCO films as effective pinning centers. ► A high Jc (77 K, 0 T) of 2.28 MA/cm2 with slow decreasing Jc–B behavior is observed in the films.