Materials Science Forum, Vol.467-470, 591-596, 2004
Texture of high temperature superconductor thick films TI-1223 and TI-2223/LaAlO3 deposited by spray pyrolysis
Superconducting Tl-1223 and Tl-2223 films have been prepared in a two steps process : deposition of Ba:Ca:Cu = 2:2:3 precursor by spray pyrolysis and ex-situ thallination. Pure textured Tl-1223 films with good superconducting properties (T-c = 113K and J(c) = 0.7 MA/cm(2) at 77K, 0T) have been obtained. Almost pure Tl-2223 films have been obtained when precursor films have been thallinated with fluorinated sources.