Figure 2: Field dependence of frequency of the HF (filled circles) and LF (open circles) modes for three films with different thickness.

The wine solid lines denote the best dispersion fitting of PSSW mode, while the dashed lines represent the best dispersion fitting of Kittel and VMSW modes. The green solid line in (a) represents the fitting of PSSW mode using Ms = 741 emu/cm3. The inset shows the partial enlargement of (a).