Abstract
Single-phase, c-axis oriented, e-doped, Sr 1− x La x CuO 2 thin films were epitaxially grown on KTaO 3 and DyScO 3 substrates by reactive rf sputtering. As-grown films being insulating due to oxygen excess, oxygen reduction is necessary to observe superconductivity. Two different procedures were employed to reach superconductivity. On one hand an in situ reduction process was conducted on a series of films deposited on both type of substrates. On the other hand, an ex situ reduction procedure was performed sequentially on a single film deposited on DyScO 3. The study of the influence of oxygen reduction on the structural and electronic properties of the thin films is presented and discussed.
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