English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Spin Hall oscillators (SHO) are promising candidates for the generation,detection and amplification of high frequency signals, that are tunable througha wide range of operating frequencies. They offer to be read out electrically,magnetically and optically in combination with a simple bilayer design. Here,we experimentally study the spatial dependence and spectral properties ofauto-oscillations in SHO devices based on Pt(7 nm)/\Ni$_{\mathrm{80}}$Fe$_{\mathrm{20}}$(5 nm) tapered nanowires. Using Brillouinlight scattering microscopy, we observe two individual self-localized spin-wavebullets that oscillate at two distinct frequencies (5.2 GHz and 5.45 GHz) andare localized at different positions separated by about 750 nm within the SHO.This state of a tapered SHO has been predicted by a Ginzburg-Landauauto-oscillator model, but not yet been directly confirmed experimentally. Wedemonstrate that the observed bullets can be individually synchronized toexternal microwave signals, leading to a frequency entrainment, linewidthreduction and increase in oscillation amplitude for the bullet that is selectedby the microwave frequency. At the same time, the amplitude of other parasiticmodes decreases, which promotes the single-mode operation of the SHO. Finally,the synchronization of the spin-wave bullets is studied as a function of themicrowave power. We believe that our findings promote the realization ofextended spin Hall oscillators accomodating several distinct spin-wave bullets,that jointly cover an extended range of tunability.

Injection locking of multiple auto-oscillation modes in a tapered nanowire spin Hall oscillator