Robust Mutual Synchronization in Long Spin Hall Nano-oscillator Chains.

ABSTRACT: Mutual synchronization of N serially connected spintronic nano-oscillators boosts their coherence by N and peak power by N². Increasing the number of synchronized nano-oscillators in chains holds significance for improved signal quality and emerging applications such as oscillator based unconventional computing. We successfully fabricate spin Hall nano-oscillator chains with up to 50 serially connected nanoconstrictions using W/NiFe, W/CoFeB/MgO, and NiFe/Pt stacks. Our experiments demonstrate robust and complete mutual synchronization of 21 nanoconstrictions at an operating frequency of 10 GHz, achieving line widths <134 kHz and quality factors >79,000. As the number of mutually synchronized oscillators increases, we observe a quadratic increase in peak pow

SUBMITTER: Kumar A 

PROVIDER: S-EPMC10375588 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature