Figure 3
Ellipticity and spectral weight. (a) Dynamic components of the circularly polarized modes +Q and −Q in a round, flat sample (N x = N y < N z ) with a small field H applied along \(\hat{z}\). The width of lines indicates the relative signal strength. (b) Ellipticity ε σ of the conical modes as a function of the demagnetization factor N x (N z = 0.53) calculated for different magnetic fields (colors). Solid and dotted lines represent modes +Q and −Q, respectively. The insets illustrate the sample shapes corresponding to N x (top) and the elliptic trajectories of the average spin precessional motion (right). (c) Spectral weight Γ σ of the conical modes (arb. units) for an excitation field h along \(\hat{x}\).
