Berlin 2008 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 32: Postersession II: Spinstruct./Phase Trans. (1-10); Spinelectronics (11-15); Thin Films (16 - 36); Particles/Clusters (37-45); Multiferroics (46-54); Spindynamics/Spin Torque (55 - 76); Post Deadlines (77-79)

MA 32.31: Poster

Freitag, 29. Februar 2008, 11:15–14:00, Poster E

Epitaxial strain and magnetic anisotropy in LaCoO₃ thin films — •Erhan Arac^1,2, Dirk Fuchs¹, and Rudolf Schneider¹ — ¹1 Forschungszentrum Karlsruhe, Institut für Festkörperphysik, — ²Physikalisches Institut, Universität Karlsruhe

LaCoO₃ (LCO) thin films do show a strain induced ferromagnetic phase transition below 85K. In order to elucidate the coupling between strain and magnetization, we have grown epitaxial LCO thin films on (001), (111) and (110) oriented (LaAlO₃)_0.3(Sr₂AlTaO₆)_0.7 single crystal substrate with different film thickness. The films were grown by pulsed laser depositions and are differently strained because of the grown direction. The magnetization reversal loops were recorded by light modulated magneto-optical Kerr effect (MOKE) magnetometry whereas strain characterization was carried out by reciprocal space mapping on a four-circle x-ray diffractometer. The magnetic anisotropy as a function of strain is studied . Preliminary results will be presented.