Regensburg 2022 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 29: Transport: Poster Session

TT 29.4: Poster

Thursday, September 8, 2022, 15:00–18:00, P1

Investigation of Hall effects in freestanding SrRuO₃ nanomembranes — •Stefan Petersen, Roman Hartmann, Elke Scheer, and Angelo Di Bernardo — University of Konstanz, Konstanz, Germany

SrRuO₃ (SRO) is a one of the most intensively studied ferromagnetic oxides with a Curie temperature of about 150 K. In addition to being ferromagnetic, SRO is also interesting because of its high conductivity at low temperatures, high chemical stability and good lattice matching with other oxides.

Recently, a new technique has been developed to manufacture freestanding nanomembranes of oxide thin films grown on a water-soluble Sr₃Al₂O₆ (SAO) sacrificial layer [1]. In our group, we have recently reproduced this process and been able to obtain freestanding nanomembranes of SRO.

We have investigated the anomalous Hall effect (AHE) and topological hall effect (THE) in SRO nanomembranes as a function of thickness and temperature, using SRO thin films grown on SrTiO₃ substrates as benchmark for comparison. We have also studied the evolution of these effects in SRO nanomembranes under a voltage-driven strain exerted by a piezoelectric substrate in contact with the nanomembrane. Our results are preliminary to the fabrication of devices with electric control of the AHE and THE.

[1] D. Lu et al., Nat. Mater. 15, 1255 (2016)