Dresden 2003 – wissenschaftliches Programm
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O: Oberflächenphysik
O 19: Symposium Magnetismus an Oberfl
ächen und Grenzfl
ächen
O 19.8: Vortrag
Dienstag, 25. März 2003, 18:30–18:45, HSZ/02
Magnetic thin films on self-organized semiconductor surfaces — •S. Abermann1, C. Hofer1, C. Teichert1, M. A. Nino2, M. J. Capitan2, and J. J. de Miguel2 — 1Inst. f. Physik, Montanuniversitaet Leoben, Austria — 2Dpto. Fisica de la Materia Condensada, Universidad Autonoma de Madrid, Spain
Self-organized semiconductor surfaces offer the potential to be used as large-area templates for the growth of magnetic nanostructures [1]. Here, Cu-Co thin films were deposited on a checkerboard array of 105 faceted SiGe pyramids grown on Si(001) [2]. Deposition was performed in two different ways: by MBE and by electrochemical methods. Atomic Force Microscopy (AFM) was used to study the morphology of these films, and Surface Magneto Optic Kerr Effect (SMOKE) and Magnetic Force Microscopy (MFM) to characterize magnetic properties. We present the morphology differences depending on the growth technique and the correlation between morphology and magnetic properties in a Co coverage range between 4 to 16 ML. In addition, the properties of the Co films are compared to those grown on smooth Si wafers. [1] C. Teichert. Physics Reports 365, 335 (2002) [2] C. Teichert, et al. Thin Solid Films 380, 28 (2000)