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DS: Fachverband Dünne Schichten

DS 30: Poster: Organic Thin Films and Thin Oxides

DS 30.12: Poster

Mittwoch, 18. März 2020, 15:00–18:00, P1A

Magnetism and Phonon Transport in (La0.6Pr0.4)0.7Ca0.3MnO3 Thin Films — •Karen P. Stroh, Vitaly Bruchmann-Bamberg, Daniel Metternich, Henning Ulrichs, and Vasily Moshnyaga — I. Physikalisches Institut, Georg-August-Universität Göttingen

Perovskite oxides represent an excellent example of correlated electron systems with strong coupling of electron, spin, and lattice degrees of freedom. They possess rich magnetic, electric, and structural phase diagrams. An example for this intriguing class of materials is the bandwidth-controlled and A-site-substituted manganite (La1-yPry)1-xCaxMnO3 (LPCMO). Heteroepitaxial LPCMO thin films were prepared by metalorganic aerosol deposition (MAD) on MgO(100) substrates and were investigated by various local and global techniques with a focus on the magnetic properties.

LPCMO is characterised by relatively strong electron-phonon coupling (EPC) and is well known as a classical colossal magnetoresistance (CMR) material. Not only magnetism but also thermal transport in manganites is substantially influenced by contributions of the lattice including Jahn-Teller distortions mediating EPC. This involves the question whether it may be used to manipulate thermal transport. Thermal conductivity in LPCMO films was studied by the 3ω technique and by means of transient thermal reflectance (TTR).

Financial support by the DFG via Project 399572199 and within the SFB 1073 (Project A02) is acknowledged.