Regensburg 2007 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 24: Spindynamics / Switching II
MA 24.2: Vortrag
Donnerstag, 29. März 2007, 10:30–10:45, H23
Magnetization dynamics of Cr02(100) thin films — •Georg Müller1, Jakob Walowski1, Marija Djordevic1, Guo-Xing Miao2, Arunava Gupta2, and Markus Münzenberg1 — 1IV. Phys. Institut, Georg-August-Universität, Göttingen, Germany — 2MINT, University of Alabama, Tuscaloosa, AL, USA.
Because of its outstanding half metallic electronic properties, the ferrromagnet Cr02 (100) is an interesting candidate for future spintronic devices. In this study the magnetization dynamics of Cr02 (100) films are examined by all-optical pump probe technique where precessional motion is induced by an anisotropy field pulse. The sample exhibits a strong magneto-crystalline in-plane anisotropy, which results in a peculiar dependence of the precessional frequency on the applied external field with respect to the anisotropy field. This behaviour can be understood by studying the energy landscape of the sample. Also the precessional damping shows a strong dependence on the applied external field in hard-axis direction. This gives rise to the question of which nature the damping mechanism in this sample is.
Research was supported by the DFG priority program 1133.