Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 33: Poster II
MA 33.19: Poster
Freitag, 26. März 2010, 11:00–14:00, Poster B1
Anisotropy studies of individual micro structured elements using the magneto-optical Kerr effect (MOKE) — •Thomas Sebastian, Georg Wolf, Andrés Conca, Britta Leven, and Burkard Hillebrands — FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany
MOKE is a well established technique for the investigation of crystal- or induced anisotropies in homogenous magnetic films of layer stacks [1]. By the use of a micro focused probing laser-beam in combination with a positioning system in horizontal and vertical direction as well as a rotator with high resolution it is possible to expand this anisotropy studies to individual micron sized elements. The new rotating Kerr-microscope setup is the experimental realization of this concept.
On the micrometer-scale the influence of the demagnetizing fields - caused by the geometrical shape of the sample - is not negligible any longer and becomes even more important with decreasing size. With our new setup it is possible to observe the magnetization reversal for different orientations of the sample taking into account the contribution of the shape anisotropy. The poster presents first results obtained with this setup for CoFe- and NiFe-ellipses.
We acknowledge financial support by the BMBF VDI-TZ 13N9913: ’MultiMag-project’.
[1] J. Hamrle et al., Magnetic anisotropies and magnetization reversal of the Co2Cr0.6Fe0.4Al Heusler compound, J. Appl. Phys. 100, 103904 (2006)