Abstract
The transverse dynamic susceptibility in thin films of ferromagnetic transition metals is calculated within the framework of the approach used by Lowde and Windsor for bulk crystals. Numerical calculations are carried out using the band structure determined in a self-consistent way according to the LCAO method. The changes of the effective Coulomb integral and of the atomic potential in the surface layers are taken into account. For wave vectors small as compared to the reciprocal lattice vector the well-defined surface spin waves with energies lower than energies of bulk modes are obtained. For greater values of the wave vector the spin wave modes are rather strongly damped.
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