Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Magnetism Poster A

MA 15.81: Poster

Dienstag, 2. April 2019, 10:00–13:00, Poster E

Interface coupling between 3d-La_0.67Sr_0.33MnO₃ and 5d-SrIrO₃ — •Lukas Bergmann, Diana Rata, Pia Düring, and Kathrin Dörr — Martin Luther University Halle-Wittenberg, Institute of Physics, Halle (Saale), Germany

Iridate compounds are of high scientific interest, since they show emergent phenomena due to competition between the relevant energy scales of electron correlation, bandwidth and, most importantly, strong spin-orbit coupling. We investigate how the interface coupling between 3d-La_0.67Sr_0.33MnO₃ (LSMO) and 5d-SrIrO₃ (SIO) alters the magnetic properties such as magnetic order and anisotropy of LSMO which is a bulk collinear ferromagnet with high spin polarization.

High-quality superlattices and bilayers of LSMO and SIO were coherently grown with systematically varied layer thicknesses by pulsed laser deposition on TiO₂ terminated (100) SrTiO₃ substrate. The structure characterization was done by XRD. The magnetic and electrical properties were investigated by SQUID and transport measurements. Bilayers of reversed growth sequence show strongly different magnetic properties. Depending on layer thickness and sample type, the saturated magnetic moment and the Curie temperature of LSMO is strongly suppressed. Our results suggest the occurrence of non-collinear Mn spin textures at the LSMO/SIO interfaces.