Characterization of c-axis oriented Y-Ba-Cu-O thin films prepared by PVD on LaAlO3 (100) and SrTiO3 (100) substrates


Ozenbas M. , Gungoren T.

PHYSICA C, cilt.341, ss.2365-2366, 2000 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

In this study, high T-c superconducting thin films of Y-Ba-Cu-O system have been prepared onto single crystals of LaAlO3 (100) and SrTiO3 (100) by resistive evaporation of YF3, BaF2 and Cu powders and a subsequent multi-stage annealing. In the deposition process, two different methods were used: mixed-powder method and sequential-deposition method. The best quality films were achieved on LaAlO3 substrates by using sequential-deposition technique with offset critical transition temperature of 88.1 K. Characterization studies by SEM/EDS of the films on LaAlO3 and SrTiO3 substrates suggested preferential orientation. XRD examinations of these films showed c-axis orientation of the superconducting phase.