title: Suppression of standing spin waves in low-dimensional ferromagnets.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden. andrea.taroni@physics.uu.se
authors.forename: Andrea
authors.initials: A
authors.lastname: Taroni
authors.forename: Anders
authors.initials: A
authors.lastname: Bergman
authors.forename: Lars
authors.initials: L
authors.lastname: Bergqvist
authors.forename: Johan
authors.initials: J
authors.lastname: Hellsvik
authors.forename: Olle
authors.initials: O
authors.lastname: Eriksson