Microwave power generated by a spin-torque oscillator in the presence of noise

Abstract

An expression for the microwave power generated by a spin-torque oscillator in the presence of thermal noise is derived. This expression, when used in a subcritical regime, demonstrates that generated power is determined by the noise level and provides a simple way to experimentally determine the threshold current for microwave generation. The same expression gives a good quantitative description of the experimentally measured dependence of the generated power on the bias current in a moderate super-critical range of bias current variation.

3 pages, 2 figures

References in corpus (1)

• Current-driven microwave oscillations in current perpendicular-to-plane spin-valve nanopillars

Cited by in corpus (17)

• Spin transfer nano-oscillators
• Lineshape distortion in a nonlinear auto-oscillator near generation threshold: Application to spin-torque nano-oscillators
• Temperature dependence of nonlinear auto-oscillator linewidths: Application to spin-torque nano-oscillators
• Decoherence and mode-hopping in a magnetic tunnel junction-based spin-torque oscillator
• Direct experimental measurement of phase-amplitude coupling in spin torque oscillators
• Spin Torque Oscillators with Thermal Noise: A Constant Energy Orbit Approach
• Amplitude-Phase Coupling in a Spin-Torque Nano-Oscillator
• Energy-efficient W${}_{\text{100-x}}$Ta${}_{\text{x}}$/CoFeB/MgO spin Hall nano-oscillators
• Non-linear dynamics of the non-Hermitian Su-Schrieffer-Heeger model
• Exceptional points as signatures of dynamical magnetic phase transitions
• Optothermal control of spin Hall nano-oscillators
• Low offset frequency $1/f$ flicker noise in spin torque vortex oscillators
• Transition from one- to two-mode generation regime in spin-torque nano-oscillator mediated by thermal noise
• Spin orbit torque nano-oscillators by dipole field-localized spin wave modes
• Spin torque antiferromagnetic nanooscillator in the presence of magnetic noise
• Charge conservation in spin torque oscillators leads to a self-induced torque
• Mutual synchronization of constriction-based spin Hall nano-oscillators in weak in-plane fields