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 (La_0.2Nd_0.2Gd_0.2Sm_0.2Y_0.2)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 (La_0.2Nd_0.2Gd_0.2Sm_0.2Y_0.2)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 700^∘C. 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