Dresden 2003 – wissenschaftliches Programm
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MA: Magnetismus
MA 10: Magnetische Abbildungsverfahren
MA 10.2: Vortrag
Dienstag, 25. März 2003, 10:30–10:45, HSZ/04
Imaging of magnetic domains during field and temperature induced spin reorientation transitions — •Thomas Eimüller1, Christoph Quitmann2, Peter Fischer1, Bernd Ludescher1, Therese Dragon1, and Gisela Schütz1 — 1Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, D-70569 Stuttgart — 2Paul-Scherrer Institut, WSLA/123, CH-5232 Villigen - PSI
The competition between shape and surface (interface) anisotropy causes in thin magnetic films a change of the magnetization from in-plane at low temperatures or small film thicknesses to out-of-plane with increasing temperature or film thickness. We imaged magnetic domains as a function of temperature during such a spin reorientation transition in the multilayered system (5Å Fe/5Å Gd)×30 by photoemission electron microscopy (PEEM) at the Swiss light source (SLS). Starting with a perpendicular magnetization at room temperature, in-plane domains nucleate and grow with increasing temperature. In the temperature range between 30∘C and 53∘C out-of-plane and in-plane domains coexist, whereas the magnetization is completely in-plane above 53∘C. Investigations by Kerr microscopy show that this spin reorientation transition can be induced also by an external magnetic field.