Fig. 4: Another representation of the angular dependences shown in the main panel of Fig. 3.

Here F and θ are the frequency of the oscillations and the angle between the magnetic field H and the z axis, respectively. The experimental data¹² are shown for H lying in the z − x (cycles) and z − y (squares) planes. The red solid lines are calculated with Eqs. (13)–(16) and the first set of the parameters from Table 2 (the second and third sets provide the same accuracy of the fit to the data). The dashed lines are described by Eq. (9) with ϵ_zx = 0.096, ϵ_zy = 0.164.