Generation linewidth of an auto-oscillator with a nonlinear frequency shift: Spin-torque nano-oscillator
arXiv:cond-mat/0703317 · doi:10.1103/PhysRevLett.100.017207
Abstract
It is shown that the generation linewidth of an auto-oscillator with a nonlinear frequency shift (i.e. an auto-oscillator in which frequency depends on the oscillation amplitude) is substantially larger than the linewidth of a conventional quasi-linear auto-oscillator due to the renormalization of the phase noise caused by the nonlinearity of the oscillation frequency. The developed theory, when applied to a spin-torque nano-contact auto-oscillator, predicts a minimum of the generation linewidth when the nano-contact is magnetized at a critical angle to its plane, corresponding to the minimum nonlinear frequency shift, in good agreement with recent experiments.
4 pages, 2 figures
References in corpus (1)
Cited by in corpus (7)
- Lineshape distortion in a nonlinear auto-oscillator near generation threshold: Application to spin-torque nano-oscillators
- Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle
- Temperature dependence of nonlinear auto-oscillator linewidths: Application to spin-torque nano-oscillators
- Experimental Test of Analytic Theory of Spin Torque Oscillator Dynamics
- Spin-torque shot noise in magnetic tunnel junctions
- Amplitude-Phase Coupling in a Spin-Torque Nano-Oscillator
- Auto-oscillation threshold and line narrowing in MgO-based spin-torque oscillators