Mutual synchronization of nano-oscillators driven by pure spin current

TL;DR

This paper demonstrates the experimental mutual synchronization of magnetic nano-oscillators driven by pure spin current, highlighting the role of spatial mode overlap and nonlinear dynamics in achieving synchronization.

Contribution

It provides the first experimental observation of mutual synchronization in nano-oscillators driven by pure spin current, elucidating the underlying mechanisms involved.

Findings

Synchronization occurs due to spatial overlap of dynamical modes.

Synchronization window is influenced by nonlinearities and magnetic fluctuations.

Potential applications in controlling spin current-induced dynamical states.

Abstract

We report the experimental observation of mutual synchronization of magnetic nanooscillators driven by pure spin current generated by nonlocal spin injection. We show that the oscillators efficiently synchronize due to the direct spatial overlap of the dynamical modes excited by spin current, which is facilitated by the large size of the auto-oscillation area inherent to these devices. The synchronization occurs within an interval of the driving current determined by the competition between the dynamic nonlinearity that facilitates synchronization, and the short-wavelength magnetic fluctuations enhanced by the spin current that suppress synchronization. The demonstrated synchronization effects can be utilized to control the spatial and spectral characteristics of the dynamical states induced by spin currents.