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Author: Schultz, Ludwig × Subject: Coherent strain ×

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    Wide-range strain tunability provided by epitaxial LaAl1−xScxO3 template films
    (Milton Park : Taylor & Francis, 2010) Herklotz, Andreas; Biegalski, Michael D.; Kim, Hyun-Sik; Schultz, Ludwig; Dörr, Kathrin; Christen, Hans M.
    The dielectric diamagnetic LaAl1− xScxO3 (LASO) (x=0–1) is proposed for adjusting of the biaxial in-plane lattice parameter of oxide substrates in the wide range from 3.79 to 4.05 Å (6.5%). This range includes the pseudocubic lattice parameters of most of the currently investigated complex oxides. The in-plane lattice parameter of strain-relaxed LASO films depends linearly on the composition, and these films grow with a smooth surface. On several different LASO-buffered substrates, ferromagnetic La0.7Sr0.3MnO3 (LSMO) films have been grown in predetermined strain states. A series of 30 nm thick LSMO films on LASO-buffered LaSrAlO4(001) demonstrates that continuously controlled coherent strains in a wide range, in this case from − 1 to +0.6%, can be obtained for the functional oxide films grown on LASO.