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DS: Fachverband Dünne Schichten

DS 44: Poster III: Focus session: Resistive switching by redox and phase change phenomena

DS 44.9: Poster

Donnerstag, 3. April 2014, 16:00–19:00, P1

Influence of Au-nanoparticles on the resistive switching properties of SrTiO₃ thin films — •Nicolas Raab¹, Oliver Schmidt², Ulrich Simon², and Regina Dittmann¹ — ¹Peter Grünberg Institut, Forschungszentrum Jülich GmbH, Jülich, 52425, Germany — ²Institut für Anorganische Chemie, RWTH Aachen University, Aachen, 52074,Germany

The strong impact of defects on the resistive switching properties of SrTiO₃ is generally assumed. Therefore we investigated a method of tailoring defect positions and thereby locally modifying the resistive switching properties of SrTiO₃ thin films.

To induce locally defined defects we processed Au-nanoparticles (AuNPs) from solution onto 0.5%wt-Nb:SrTiO₃ substrates. We expect the AuNPs to act as defect nuclei for the subsequently PLD-grown SrTiO₃ thin films. We investigated the correlation between the topography and the local conductivity by performing in-situ LC-AFM measurements with area scanning as well es grid measurements. These measurements combine topography scans with single point spectroscopy, leading to I-V curves correlated with defined positions on the surface.

We measured differences in the resistive switching behavior between the AuNPs, their immediate vicinity and the more distant areas. In the immediate vicinity of the AuNPs the SrTiO₃ thin film can be switched, whereas the other areas show no change in the conductivity. We will discuss the influence of defects formed in the vicinity of the AuNPs on the local switching properties.