Berlin 2018 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 31: Poster Session II

DS 31.8: Poster

Donnerstag, 15. März 2018, 11:15–13:15, Poster F

B-site Ordering in La2CoMnO6 Films: Influence of Lattice Strain — •Philipp Ksoll¹, Christoph Meyer¹, Sven Esser², Vladimir Roddatis³, and Vasily Moshneaga¹ — ¹Erstes Physikalisches Institut, Georg-August-Universität Göttingen, Deutschland — ²Lehrstuhl für Experimentalphysik VI, Institut für Physik, Universität Augsburg, Deutschland — ³Institut für Materialphysik, Georg-August-Universität Göttingen, Deutschland

Physical properties of double perovsikte (DP) with general formula A2BB'O6 (A=rare earth or alkaline earth metals: B/B' = Co/Mn, Ni/Mn, Fe/Mo) depend strongly on the degree of B-site ordering. To optimize and control the structure, magnetism and electrical properties we further developed the metalorganic aerosol deposition (MAD) technique to grow DP films in a layer-by-layer (LL) mode under a precise control of oxygen atmosphere during deposition process. Epitaxial films of the prototype DP La2CoMnO6 have been LL-grown on (111)-oriented SrTiO3, LaAlO3 and Al2O3(0001) substrates and characterized by global (x-Ray, SQUID, Raman) and local (TEM) techniques. The role of substrate-induced epitaxial strain on the B-site ordering is discussed. Further on, a half-metallic ferromagnetic Sr2FeMoO6 films with transition temperatures well above room temperature, Tc~450 K, will be obtained. Financial support by the DFG via projects Ro5387/3-1 and Mo2255/3-1 is acknowledged.