Dissipation characteristics of quantized spin waves in nano-scaled   magnetic ring structures
  The spatial profiles and the dissipation characteristics of spin-wave quasi-eigenmodes are investigated in small magnetic Ni$_{81}$Fe$_{19}$ ring structures using Brillouin light scattering microscopy. It is found, that the decay constant of a mode decreases with increasing mode frequency. Indications for a contribution of three-magnon processes to the dissipation of higher-order spin-wave quasi-eigenmodes are found. 
H. Schultheiss, C.W. Sandweg, B. Obry, S.J. Hermsdoerfer, S. Schaefer,   B. Leven, and B. Hillebrands