Figure 1
From: Injection locking at 2f of spin torque oscillators under influence of thermal noise
Phase noise calculated from the analytic model (a) and numerical simulations at 50 K for the phase (d) and amplitude (c) noise. Notice the peaks appearing ~200–300 MHz. (d) PSD of the signal as a function of ε for JDC = −50 × 1010 A/m2 and schematics of the oscillator (inset). (e) Linewidth vs. ε for low current JDC = −40 × 1010 A/m2 (red dots) and medium current JDC = −50 × 1010 A/m2 (blue dots). For ε > 0.3 (medium JDC regime), the linewidth falls below the resolution of the technique.(f) Sideband frequency for both low current regime (red set) and medium current regime (blue set) extracted from the PSD (stars), and from the peaks on the phase noise (Fig. 1b) (open circle). The solid line corresponds to the analytical model developed for the IPP geometry (eq. 4).
