Dresden 2020 – wissenschaftliches Programm
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TT 46.22: Poster
Mittwoch, 18. März 2020, 15:00–19:00, P2/2OG
Combined experimental and theoretical study of Pr0.5Sr0.5MnO3 thin films under tensile strain — •Lokamani Lokamani1,2, Changan Wang1, Matthias Zschornak1,4, Ulrich Kentsch1, Peter Zahn1, Bangmin Zhang3, Shengqiang Zhou1, and Sibylle Gemming1,4 — 1Institute of Ion Beam Physics and Materials Research, HZDR, Germany — 2Department of Information Services and Computing, HZDR, Germany — 3Department of Materials Science and Engineering, National University of Singapore, Singapore — 4Institute of Physics, TU Chemnitz, Germany
Perovskites manganites with the general chemical formula A1−xBxMnO3 are known to exhibit interesting electronic and magnetic properties, which can be further modified by varying the in-plane and out-of-plane lattice parameters. In this poster, we report a transition from insulator to metal in Pr0.5Sr0.5MnO3 epitaxial thin films by using He ion irradiation. With increasing fluence, the out-of-plane (c-axis) lattice constant expands continuously by defect creation. Although the defect density tends to increase the resistivity, irradiated films show metallic behaviour at low temperature. We also present a comparison using density functional theory including Hubbard-U corrections to account for strongly localized Mn d- and Pr f-electrons.