Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 46: Magnetic Thin Films II
MA 46.5: Vortrag
Mittwoch, 16. März 2011, 18:00–18:15, CHE 184
Structure and magnetic anisotropy of Co/Pt thin films — •Gerrit Winkler1, André Kobs1, Wolfgang Kreuzpaintner2, Simon Hesse1, Dieter Lott2, Andreas Schreyer2, and Hans Peter Oepen1 — 1Institut für Angewandte Physik, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany — 2Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH Max-Planck-Straße 1, 21502 Geesthacht, Germany
The crystallographic properties of Co/Pt multilayer films were studied using x-ray reflectometry and x-ray diffraction in order to understand the magnetic anisotropy. The texture of the multilayers depends on substrate. For multilayers on natural oxidized Si the strongest texture is found. The interface quality is almost the same for all substrates. We find a small interface roughness of about one atomic layer while intermixing of Co and Pt appears to a certain amount. The magnetic anisotropy has been investigated by means of the magneto-optic Kerr effect. From the variation of the magnetic anisotropies on Co thickness we determine the volume and interface anisotropy contribution. For multilayers grown on natural oxidized Si we find the highest interface anisotropy while the volume anisotropy is strongest for systems on SiN. The behavior of the magnetic anisotropy is discussed in the framework of the structural results.