Fig. 6
From: Nutational resonance modes in antiferromagnetic materials

Comparison of the precessional modes of the orthoferrite (EFO) and hematite (FO) to the resonance modes of the toy-model FM and AFM. In (a), for each resonance mode, the frequency normalised to its value in the inertia-free case is plotted versus the inertial parameter normalised to the period duration of that mode in the inertia-free case. Figures (b) and (c) show the same for the lifetimes and effective lifetimes.