Effects of delayed feedback on the power spectrum of spin-torque nano-oscillators. (16th September 2020)

• Record Type: Journal Article
• Authors: Williame, Jérôme; Kim, Joo-Von
• Is Part Of: Journal of physics. Volume 53:Number 49(2020)
• Publication Date: 2020-09-16
• Subjects: spin-torque nano-oscillator -- delayed feedback -- magnetization dynamics -- stochastic processes; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/abaf26
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: A theoretical study of delayed feedback in a spin-torque nano-oscillator model is presented. The feedback acts as a modulation of the supercriticality, which results in changes in the oscillator frequency through a strong non-linearity, amplitude modulations, and a rich modulation sideband structure in the power spectrum at long delays. Modulation sidebands persist at finite temperatures but some of the complex structure is lost through the finite coherence time of the oscillations.