Figure 4: Oscillation frequency f and stable orbit radius X as function of the spin-polarized current.
From: Large Hysteresis effect in Synchronization of Nanocontact Vortex Oscillators by Microwave Fields

(a) f(I), (b) X(I) for θp = 0 (out-of-plane polarizer); (c) f(I), (d) X(I) for θp = 84° (in-plane polarizer). Solid lines are obtained from eq. 8, whereas lines with symbols refer to the results of full micromagnetic simulations.