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arXiv · 1709.04310

Chaotic dynamics in a macrospin spin-torque nano-oscillator with delayed feedback

Jérôme Williame·Artur Difini Accioly·Damien Rontani·Marc Sciamanna·Joo-Von Kim
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Abstract

A theoretical study of delayed feedback in spin-torque nano-oscillators is presented. A macrospin geometry is considered, where self-sustained oscillations are made possible by spin transfer torques associated with spin currents flowing perpendicular to the film plane. By tuning the delay and amplification of the self-injected signal, we identify dynamical regimes in this system such as chaos, switching between precession modes with complex transients, and oscillator death. Such delayed feedback schemes open up a new field of exploration for such oscillators, where the complex transient states might find important applications in information processing.

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Jérôme Williame, Artur Difini Accioly, Damien Rontani, Marc Sciamanna, Joo-Von Kim. 2017-09-13. Chaotic dynamics in a macrospin spin-torque nano-oscillator with delayed feedback. https://arxiv.org/abs/1709.04310

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