Dresden 2006 – wissenschaftliches Programm
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MA: Magnetismus
MA 7: Micro- and Nanostructured Magnetic Materials I
MA 7.5: Vortrag
Montag, 27. März 2006, 16:00–16:15, HSZ 03
Magnetic reversal of microstructured patterns — •Andreas Westphalen, Arndt Remhof, Katharina Theis-Bröhl, and Hartmut Zabel — Institut für Experimentalphysik/Festkörperphysik,
We have investigated the magnetization reversal of regular arrays of magnetic continuous and discontinuous open triangles using the magneto-optical Kerr effect in Vector-MOKE and Bragg-MOKE configuration. With Vector-MOKE both components of the magnetization vector, mx and my, yield the vector sum of the average magnetization vector. We performed Vector-MOKE not only at the specular reflection, but also at diffraction spots where we obtain information about the Fourier components of the magnetization distribution. For the analysis we have combined MOKE measurements with micromagnetic simulations. A satisfactory agreement between the experiments and the predictions from the micromagnetic model allows the interpretation of the experimental data. By interrupting the triangular structure with one or more notches the remagnetization breaks down into individual reversals in different parts of the structure. The continuous triangles are characterized by a narrow switching field distribution; the formation of domains is more favored in the discontinuous triangles than in the continuous ones.
We acknowledge financial support through SFB 491.