Dresden 2006 – scientific programme
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MA: Magnetismus
MA 9: Magnetic Imaging
MA 9.1: Talk
Monday, March 27, 2006, 15:00–15:15, HSZ 401
High resolution imaging of 3d magnetic domain structures in multilayers and ultrathin films — •C. Menk1, R. Frömter1, K. Morrison1, H. Stillrich1, S. Pütter1, H.P. Oepen1, and J. Kirschner2 — 1Institut für Angewandte Physik Universität Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
We have investigated the magnetic microstructure of Co(5 Å)/Pt(20 Å)-multilayer films using our new scanning electron microscope with polarization analysis (SEMPA or spin-SEM). The films have been grown by ECR sputtering on a silicon substrate. The characterization with magneto-optic Kerr effect has shown a predominantly perpendicular behavior. Looking spatially resolved at remanence we find the well-known maze pattern, but in the in-plane components. So actually the magnetization turns out to be canted. As the multilayer has been covered in-situ by an ultrathin Fe layer before domain structure investigation, we have systematically studied the influence of the Fe layer on magnetization canting.
Our spin-SEM is designed for measuring two orthogonal in-plane magnetization components. We will demonstrate that the improved image quality can be used to extract information about the square of the vertical polarization component as well. This, together with the lateral resolution of 10 nm, will be demonstrated by a 3d vectorial analysis of the magnetic vortex structure of cross-tie walls in thin polycrystalline Fe films.