Formation of Thermally Stable Multilayered BSCCO Films with 2223, 2234 and 2245 Structures

Abstract
The conditions to synthesize the thermally stable, multilayered BSCCO films with 2223, 2234 and 2245 structures have been investigated. It is shown that the films sputter-deposited at T s=665°C became thermally stable and showed super-conductivity in their as-deposited state when the appropriate target composition and cooling process were chosen. However, the multilayered films decomposed partially or completely into the 2212+2201 or 2212 phase when the substrate temperature was about 20 to 45°C lower than the above condition.