Suppression of Standing Spin Waves in Low-Dimensional Ferromagnets

Details Suppression of Standing Spin Waves in Low-Dimensional Ferromagnets Suppression of Standing Spin Waves in Low-Dimensional Ferromagnets

2011-03-10

arxiv.org/abs/1103.1997v2

Phys. Rev. Lett. 107, 037202 (2011)

Physics

Condensed Matter

Materials Science

5 pages, 4 figures, Fig. 3 changed, Fig. 4 added

Scientific paper

10.1103/PhysRevLett.107.037202

We examine the experimental absence of standing spin wave modes in thin magnetic films, by means of atomistic spin dynamics simulations. Using Co on Cu(001) as a model system, we demonstrate that by increasing the number of layers, the "optical" branches predicted from adiabatic first-principles calculations are strongly suppressed, in agreement with spin-polarized electron energy loss spectroscopy measurements reported in the literature. Our results suggest that a dynamical analysis of the Heisenberg model is sufficient in order to capture the strong damping of the standing modes.

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