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TT: Fachverband Tiefe Temperaturen

TT 46: Poster Session: Frustrated Magnets, Quantum Magnets, Charge Order and Complex Oxids

TT 46.22: Poster

Mittwoch, 18. März 2020, 15:00–19:00, P2/2OG

Combined experimental and theoretical study of Pr_0.5Sr_0.5MnO₃ thin films under tensile strain — •Lokamani Lokamani^1,2, Changan Wang¹, Matthias Zschornak^1,4, Ulrich Kentsch¹, Peter Zahn¹, Bangmin Zhang³, Shengqiang Zhou¹, and Sibylle Gemming^1,4 — 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 A_1−xB_xMnO₃ 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 Pr_0.5Sr_0.5MnO₃ 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.