Long-range mutual synchronization of spin Hall nano-oscillators

Awad, A. A., Dürrenfeld, P., Houshang, A., Dvornik, M., Iacocca, Ezio, Dumas, R. K. and Åkerman, J. (2017) Long-range mutual synchronization of spin Hall nano-oscillators. Nature Physics, 13 (3). pp. 292-299. ISSN 1745-2473

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Awad et al - Long-range mutual synchronization of spin Hall nano-oscillators AAM.pdf - Accepted Version

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Official URL: https://doi.org/10.1038/nphys3927

Abstract

The spin Hall effect in a non-magnetic metal with spin–orbit coupling injects transverse spin currents into adjacent magnetic layers, where the resulting spin transfer torque can drive spin wave auto-oscillations. Such spin Hall nano-oscillators (SHNOs) hold great promise as extremely compact and broadband microwave signal generators and magnonic spin wave injectors. Here we show that SHNOs can also be mutually synchronized with unprecedented efficiency. We demonstrate mutual synchronization of up to nine individual SHNOs, each separated by 300 nm. Through further tailoring of the connection regions we can extend the synchronization range to 4 μm. The mutual synchronization is observed electrically as an increase in the power and coherence of the microwave signal, and confirmed optically using micro-Brillouin light scattering microscopy as two spin wave regions sharing the same spectral content, in agreement with our micromagnetic simulations.

Item Type: Article
Subjects: F300 Physics
F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 17 Sep 2019 13:56
Last Modified: 11 Oct 2019 12:30
URI: http://nrl.northumbria.ac.uk/id/eprint/40716

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