Excitation Spectrum of the Néel Ensemble of Antiferromagnetic Nanoparticles as Revealed in Mössbauer Spectroscopy

Figure 3

Dissipationless trajectories of motion of sublattice magnetizations and for an ideal antiferromagnetic particle. Nutations of the magnetization vectors with for (a) −1.003 and (b) −0.999. Nutations of the magnetization vectors with values m = (c) 0.08 and (d) 0.075 for . Panel (a) shows 23 initial nutations whereas panels (b)–(d) show the first nutations. Points show minimum and maximum values of projections and during nutations.

(a)

(b)

(c)

(d)