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 18.57: Poster

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

Remagnetization patterns in 2-d arrays of hard magnetic elements embedded in a soft magnetic matrix — •Sven Schnittger¹, Jonas Norpoth¹, Christian Jooss¹, Sybille Sievers², and Uwe Siegner² — ¹Institut für Materialphysik, Universität Göttingen — ²Physikalisch-Technische Bundesanstalt, Braunschweig

In a regular array of moderately hard magnetic elements, the stray field coupling between neighbouring elements may become important. In this contribution, the influence of a surrounding soft magnetic matrix on this magnetostatic interaction is investigated [1]. The remagnetization behaviour of 2-d artificial dot arrays is examined by means of Magnetic Force Microscopy (MFM) and Magneto-Optic Indicator Film-Technique (MOIF). (001)-L10 CoPt and Co-ferrite provide regularly arranged elements with different magnetocrystalline anisotropy; the mediating soft magnetic matrix consists of Permalloy. A Permalloy antidot array is investigated as reference sample. Additionally, straightforward stray field calculations are performed to determine characteristic features of the corresponding stray field distributions.

[1] S. Schnittger, S. Dreyer, Ch. Jooss, S. Sievers, and U. Siegner, APL 90, 042506 (2007)