Preparation of double-sided CeO2 buffer layers on MgO substrates for YBa2Cu3O7-x films

摘要

Double-sided CeO2 buffer layers were fabricated by pulsed-laser deposition on 20 mm × 20 mm MgO[100] substrates to apply YBCO films using the TFA-MOD (trifluoroacetate-metalorganic deposition) process for microwave devices. The double-sided CeO2 films had the characteristics of a smooth surface (Rms < 1 nm) and a highly [100] aligned orientation, which is almost independent of thickness. We successfully obtained a YBCO film deposited by the TFA-MOD process on CeO2/MgO[100], which had a critical current density (Jc) of 6 MA/cm2 (77 K, 0 T) with good reproducibility.