  Further development of a previously introduced method for numerically
simulating magnetic spin waves is presented. Together with significant
improvements in speed, the method now allows one to calculate the energy
absorbed by the various modes excited by a position- and time-dependent H1
field in a ferromagnetic body of arbitrary shape in the presence of a (uniform
or non uniform) static H0 field as well as the internal exchange and anisotropy
fields. The method is applied to the case of the single vortex state in a thin
disc, a ring, and various square slabs, for which the absorption spectra are
calculated and the most strongly excited resonance modes are identified.

Materials Science