Regensburg 2010 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 10: Poster I

MA 10.52: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

Influence of strain on magnetic and electrical properties of La0.82Sr0.18CoO3 films — •Orkidia Bilani-Zeneli, Diana Rata, Andreas Herklotz, Ludwig Schultz, and Kathrin Dörr — IFW Dresden, Institute for Metallic Materials, Helmholtzstrasse 20, 01069 Dresden, Germany

Cobaltite perovskites La(1-x)Sr(x)CoO3 have received attention mainly due to the thermally driven spin state transitions of the Co ions. For different doping, these transitions have been shown to be sensitive towards pressure in bulk and epitaxial strain in thin films. La(1-x)Sr(x)CoO3 with x=0.18 is of particular interest because it is located near the boundary of the Metal-Insulator transition. We have grown epitaxial La0.82Sr0.18CoO3 (LSCO) thin films by pulsed laser deposition on different substrates (PMN-PT, LaAlO3, SrTiO3, LSAT) providing reversible and static strain. In this work the influence of biaxial strain on the magnetic and electrical transport properties of LSCO films will be presented. Thin films reveal significant differences in magnetic behaviour with respect to bulk, e.g. the coercive fields are strongly enhanced. On the other hand tensile strain strongly suppresses the electrical conduction stabilizing thus an insulator state.