Figure 3: Comparison between the vortex oscillation frequency estimated with full micromagnetic simulations and evaluated with reduced order model for different current values.
From: Large Hysteresis effect in Synchronization of Nanocontact Vortex Oscillators by Microwave Fields
(a) The red circles, blue squares and green triangles are obtained from MUMAX38 for I = 10 mA, I = 5 mA and I = 2.5 mA respectively. The continuous line of the same color is related to the same current value but is obtained from eq. (5) using the polynomial expression for W(X, I). (b) Different contributions to the total frequency f according to eq. (5). The blue curve represents the frequency estimated according to eq. (5) under the assumption of rigid vortex profile for the magnetization distribution and considering only the Zeeman energy due to the Oersted field.
