Berlin 2008 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 18: Poster I : Bio Magn. (1-2); Mag.Imgaging (3-9); Magn. Semiconductors (10-16); Half Metals & Oxides (17-20); Coupl.Phenomena (21-27); Magn. Mat. (28-41); Micro & Nanostr. Magn. Materials (42-61); Micro Magn. (62-64); Surface Magnetism (65-70); Transport Phenomena (71-85)

MA 18.79: Poster

Dienstag, 26. Februar 2008, 15:15–18:30, Poster E

Tunneling magnetoresistance in all-oxide La_0.7Sr_0.3MnO₃/ MgO/ La_0.7Sr_0.3MnO₃ tunnel junctions — •Stephanie Raabe, Vasily Moshnyaga, Kai Gehrke, and Konrad Samwer — I. Physikalisches Institut der Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen

Half-metallic La_0.7Sr_0.3MnO₃ (LSMO) looks very promising for spintronic applications. We have studied all-oxide structures LSMO(100) / MgO(100) / LSMO(100) prepared by means of Metalorganic Aerosol Deposition (MAD). Epitaxial LSMO films on MgO(100) substrate with T_C=360K and residual resistance ρ=16· 10⁻⁵ Ω cm were obtained. Additionally we have shown that MgO grows also epitaxially on LSMO, which gave us the opportunity to prepare epitaxial tunneling LSMO/MgO/LSMO trilayers. Results on tunneling magnetoresistive effects will be presented.