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DS: Fachverband Dünne Schichten

DS 33: Poster: Thin Films: Applications, Transport and Phase Change Materials

DS 33.8: Poster

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

Electrical and Thermal Transport Properties of Ion-Beam Sputtered Epitaxial Manganite Perovskite Films — •Tim Sievert, Gottfried Schnabel, Birte Kressdorf, Jörg Hoffmann, and Christian Jooss — Institut für Materialphysik, Georg-August-Universität Göttingen

Perovskite oxides are a promising class of materials for microelectronics and energy harvesting. Strongly correlated manganite thin films reveal interesting transport properties which can be drastically altered by phase transitions. Due to their dependence on strain, off-stoichiometry and point defects, they are influenced by ion beam sputtering conditions. Thus, it is crucial to understand the impact of fabrication on the resulting material and fundamental processes within the material.

In this contribution we examine the interrelation between fabrication parameters, growth and film properties like strain, composition, electric and thermal transport of manganite perovskites, such as La_1−xSr_xMnO₃, Pr_1−xCa_xMnO₃ on SrTiO₃(100) substrates. The temperature dependence of thermal, electrical and optical conductivity as well as magnetization between 5 K to 400 K are correlated with the microstructure and phase transitions in order to improve the understanding of the impact of defects on the phase diagram and transport phenomena. For the study of photo-electric characteristics, steps into the growth of optically transparent conducting contacts are pursued based on sputtering of indium tin oxide films.