February 15, 2010 to March 1, 2010
Europe/Stockholm timezone

Magnon Softening in a ferromagnetic monolayer

Feb 16, 2010, 10:00 AM


Dr Anders Bergman (Uppsala University)


We study the Fe/W(110) monolayer system through a combination of first principles calculations and atomistic spin dynamics simulations. We focus on the dispersion of the spin waves parallel to the [001] direction. Our results compare favorably with the experimental data of Prokop et al. [Phys. Rev. Lett. 102, 177206], and correctly capture a drastic softening of the magnon spectrum, with respect to bulk bcc Fe. The suggested shortcoming of the itinerant electron model, in particular that given by density functional theory, is refuted. We also demonstrate that finite temperature effects are significant, and that atomistic spin dynamics simulations represent a powerful tool with which to include these.

Primary author

Dr Anders Bergman (Uppsala University)

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