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MA: Fachverband Magnetismus

MA 57: Posters Magnetism II

MA 57.19: Poster

Donnerstag, 19. März 2020, 15:00–18:00, P3

Interfacial Ferromagnetism of LaMnO₃/SrMnO₃ Superlattices — •Robert Gruhl and Vasily Moshnyaga — I. Physikalisches Institut, Georg-August-Universität Göttingen, Germany

Interfaces of transition metal oxides show unique properties which cannot be observed in the constituent bulk materials. The prominent example is the formation of a 2D electron gas in LaAlO₃/SrTiO₃. These emergent interfacial phenomena are believed to arise due to the complex charge, spin and orbital reconstructions at the interfaces. Superlattices (SLs) of LaMnO₃ (LMO) and SrMnO₃ (SMO) were prepared on SrTiO₃(100) and LSAT(100) substrates using the metalorganic aerosol deposition. The growth, controlled in-situ by optical ellipsometry, results in superlattices with flat and chemically sharp interfaces as well as in an atomically smooth surface morphology.

The prepared SLs show complex magnetic behavior with high- and low-temperature ferromagnetic phases. Samples with small superlattice periods and high interface densities were prepared to investigate the interfacial magnetism. Furthermore, the substrate-induced stress effects on the magnetic properties of SLs were studied. Financial support of the Deutsche Forschungsgemeinschaft via SFB 1073 TP A02 is acknowledged.