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MA: Fachverband Magnetismus

MA 19: Micro Magnetism / Computational Magnetism

MA 19.1: Vortrag

Mittwoch, 25. März 2009, 10:15–10:30, HSZ 403

Quantized spin waves in ferromagnetic and antiferromagnetic systems with domain wall. — •Robert Wieser, Elena Y. Vedmedenko, and Roland Wiesendanger — Institute of Applied Physics and Microstructure Research Center Hamburg, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg

The understanding of the magnetization dynamics of nanosized magnets has been the aim of many recent experimental and theoretical studies. Micromagnetic simulations have become a powerful tool to study the static and dynamic processes. One interesting topic in this field are standing spin waves. We investigate standing spin waves in ferromagnetic and antiferromagnetic systems in the presence of a transverse 180^∘ domain wall. To investigate the spin waves, we have performed simulations by solving the Landau-Lifshitz-Gilbert equation and calculated the time dependent power absorption. We compare the numerical results with analytical calculations to proof the applicability. Further we demonstrate the fundamental differences between ferromagnetic and antiferromagnetic spin wave solutions [1] and show new analytical formulas to describe spin waves in frustrated antiferromagnetic spin rings.

[1] R. Wieser, E. Y. Vedmedenko, R. Wiesendanger, Phys. Rev. Lett. 101, 177202 (2008)