Dresden 2020 – scientific programme

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DS: Fachverband Dünne Schichten

DS 31: Poster: Layer Deposition and Layer Properties

DS 31.3: Poster

Wednesday, March 18, 2020, 15:00–18:00, P1A

Compositionally Modulated La_1−x(t)Sr_x(t)MnO₃ Superlattices — •Yannik Sievers, Robert Gruhl, Vitaly Bruchmann-Bamberg, and Vasily Moshnyaga — Erstes Physikalisches Institut, Georg-August-Universität Göttingen

Bulk perovskite manganites La_1−xSr_xMnO₃ (LSMO) possess a rich phase diagram, depending on the Sr-doping level, x. Usually, one examines only few special doping levels depending on the desired properties. Instead of a fixed doping level we studied LSMO films in a form of artificial lattices, consisting of layers with a different and alternating doping levels, yielding compositionally modulated La_1−x(t)Sr_x(t)MnO₃ superlattices with controllable doping level x(t) (x = t/d with t = [0,d]: time and d: transition-layer width). To grow such gradient lattices we further developed our metal-organic aerosol deposition (MAD), making possible the simultaneous usage of LMO and SMO precursor channels, which can be supplied by controllable feeding rates. The resulting artificial LSMO superlattices have been grown on SrTiO₃(100) and characterized by AFM, XRD, XRR, SQUID, Raman-Spectroscopy as well as by in-situ ellipsometry. Financial support by DFG via SFB 1073 is acknowledged.