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Berlin 2024 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 20: Poster II

DS 20.12: Poster

Donnerstag, 21. März 2024, 18:00–20:30, Poster D

Growth, Structural and Mangetic Properties of High Entropy Perovskite (La0.2Nd0.2Gd0.2Sm0.2Y0.2)MnO3 Thin Films — •Maximilian Mihm, Aladin Ullrich, David Stein, Christian Holzmann, Helmut Karl, and Manfred Albrecht — Institute of Physics, University of Augsburg, Universitätsstraße 1, 86159 Augsburg, Germany

High entropy manganite-perovskites such as (La0.2Nd0.2Gd0.2Sm0.2Y0.2)MnO3 (LNGSYMO) are typically produced as a powder and can exhibit interesting magnetic properties. We have grown thin films of LNGSYMO via pulsed laser deposition on SrTiO3 (001) (STO) at 700C. X-ray diffraction data confirmed epitaxial growth of LNGSYMO. Wide-range reciprocal space mapping and electron backscattered diffraction revealed, that LNGSYMO has three different crystal orientations. LNGSYMO grows in two different out-of-plane directions (001) and (110). The (001) orientated crystals are rotated by 45 with respect to the substrate, while the (110) crystals are aligned either to the substrate lattice or are also rotated by 45. Zero-field cooled and field cooled (FC) measurements revealed a magnetic transition temperature at around 38 K for LNGSYMO grown on STO. This is in good agreement with the magnetic measurements on corresponding powder samples. Below 25 K the rare earth elements couple antiferromagnetic to the Mn, which is indicated by a decrease of the magnetization in the FC curve.

Keywords: High entropy perovskite; Thin film; Pulsed laser deposition; Structural characterization; Magnetic properties

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