Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 26: Micromagnetism / Computational Magnetics
MA 26.6: Vortrag
Mittwoch, 28. März 2012, 12:00–12:15, H 0112
Magnetic Force Microscopy on single crystalline Fe70Pd30 ferromagnetic shape memory films — •Anja Graumann1, Yanhong Ma1, Alexander Malwin Jakob1,2, Frank Frost1, and Stefan Georg Mayr1,2 — 1Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstr. 15, 04318 Leipzig, Germany — 2Translationszentrum für Regenerative Medizin und Fakultät für Physik und Geowissenschaften, Universität Leipzig, 04318 Leipzig, Germany
Fe70Pd30 ferromagnetic shape memory thin films of 500 nm thickness grown on MgO (100) single crystal substrates at approximately 900 °C show a twin-related relief at the sample surface imaged by scanning electron and atomic force microscopy. Using X-ray diffraction measurements with Cu Kα radiation the existance of a martensitic face centered tetragonal phase at room temperature - a necessary condition for the shape memory effect - could be confirmed. To characterize micromagnetic properties, magnetic force microscopy has been performed. Central focus lies on correlations between magnetic and structural properties of the film. The measurements are interpreted with the help of micromagnetic simulations, which reveal a complex magnetic structure governed by shape and crystallographic anisotropies. This work is funded by the German Research Foundation.