Synthesis of smooth and superconducting (Cu, C)–Ba–O/CaCuO2/(Cu, C)–Ba–O films using SrCuO2 buffer

Abstract Artificially stacked structures of [(infinite layer CaCuO 2 ) k /(superconducting (Cu, C)Ba 2 CuO x :(Cu, C)-1201) l ] m were fabricated on SrCuO 2 buffer layer by means of sequential deposition of each block using pulsed laser deposition. Smooth and epitaxial growth all over the deposition cycles of (Cu, C)-1201 and CaCuO 2 were confirmed by streak patterns of in situ RHEED. In comparison with (Cu, C)-1201 single layer films, the artificial stacking resulted in a rise of superconducting properties, T c - onset and T c ( ρ =0) up to 95 K and 65 K, respectively.