Preparation of stacked structures based on HTS by MOCVD: growth problems of c-axis and non c-axis BiSrCaCuO/Bi/sub 4/Ti/sub 3/O/sub 12/ heterostructures

Several articles report two-layer c-axis heterostructures of Bi/sub 4/Ti/sub 3/O/sub 12/ on BiSrCaCuO. However in some applications, or for integration purposes, multi-layer geometries composed of alternating c-axis or non c-axis thin films might be useful. From this perspective we investigated growth of c-axis and non c-axis BiSrCaCuO on Bi/sub 4/Ti/sub 3/O/sub 12/ structures. The paper mainly focuses on evaluation of the structures from the growth, stability/interdiffusion, uniformity/morphology points of view based on structural and microstructural data.