Berlin 2018 – scientific programme
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DS: Fachverband Dünne Schichten
DS 17: Poster Session I
DS 17.20: Poster
Tuesday, March 13, 2018, 18:15–20:15, Poster B
Influence of pre-growth conditions on the interface formation in SrTiO3 homoepitaxial thin films grown with pulsed laser deposition (PLD) — •Laura Bogula, Toni Markurt, Martin Albrecht, and Jutta Schwarzkopf — Max-Born-Str. 2, 12489 Berlin, Germany
In this poster a systematic study on the pre-growth conditions of a model perovskite system, namely homoepitaxial SrTiO3 thin films grown by pulsed laser deposition (PLD) will be presented. In order to understand the origin of its functional properties and the correlation to defects the interface between substrate and film is of utmost importance. Therefore, we investigated the influence of different pre-growth conditions like oxygen partial pressure and substrate temperature on the surface reconstruction and the resulting interface. On as prepared SrTiO3 substrates we observed a (√13×√13)−R33.7∘ reconstruction causing a non-stoichiometric interface measured both with transmission electron microscopy and x-ray diffraction. However, with vacuum annealing the surface structure can be altered to more favourable reconstructions for homoepitaxial thin film growth.