In-plane aligned YBCO thick films grownin situby high temperature ultrasonic spray pyrolysis

Ultrasonic spray pyrolysis (USP) has been used to deposit thick films (up to 5 micron) of YBa 2 Cu 3 O 7- x in situ on single-crystal oxide substrates, and single-crystal and textured polycrystalline Ag foil of different orientations. Epitaxial films grow with a strong level of in-plane texture on the single crystal oxide substrates (<3° full width at half maximum) and on (100) and (110) oriented Ag. Films grown under optimized conditions have onset T c of 91 K with transition widths of ~ 6 K. The films are fully connected and J c are ~ 1.0×10 4 A cm -2 at 77 K and ~ 5×10 5 A cm -2 at 20 K.