BSCCO/STO/BSCCO Structures by the MOD Method

Abstract

Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub x/(BSCCO)/SrTiO/sub 3/(STO)/BSCCO trilayer structures were prepared by the metal-organic decomposition (MOD) method. In this study, annealing condition of BSCCO thin films prepared by the MOD method were investigated. High quality films having critical temperature (Tc) of 84 K were obtained on STO [001] substrate by a 2-step annealing process with 100% O/sub 2/ for 2 h at 870/spl deg/C and 10% O/sub 2/ for 2 h at 885/spl deg/C. The STO layer prepared by the MOD method was grown epitaxially on the BSCCO thin films, and the top BSCCO layer was also grown epitaxially on the STO layer. The BSCCO/STO/BSCCO structure showed a Tc of 77 K.