Berlin 2008 – scientific programme

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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 18.59: Poster

Tuesday, February 26, 2008, 15:15–18:30, Poster E

Magnetization reversal in a twodimensional two-phase magnet — •Sibylle Sievers¹, Sven Schnittger², Sebastian Dreyer², Christian Jooss², Kai-Felix Braun¹, and Uwe Siegner¹ — ¹Physikalisch-Technische Bundesanstalt, Braunschweig — ²Institut für Materialphysik, Universität Göttingen

We characterized the remagnetization behaviour of a two-dimensional two-phase ferromagnet. For the fabrication of the two phase magnet hard magnetic structures (CoPt) were patterned and embedded in a soft magnetic film (Permalloy). The magnetic characterization has been done by a magneto-optical indicator film technique using the Faraday Effect and by magnetic force microscopy. The remagnetization process was investigated at increasing reversal fields. In the soft magnetic matrix a long range ordered symmetry breaking domain pattern was found. Furthermore, a correlation between reversal domains in the hard magnetic structures and the matrix was observed. The mechanisms of the magnetization reversal will be discussed.