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Long-range mutual synchronization of spin Hall nano-oscillators
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2017 (engelsk)Inngår i: Nature Physics, ISSN 1745-2473, E-ISSN 1745-2481, Vol. 13, nr 3, s. 292-+Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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 mu m. 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.

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Nature Publishing Group, 2017. Vol. 13, nr 3, s. 292-+
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URN: urn:nbn:se:kth:diva-204074DOI: 10.1038/NPHYS3927ISI: 000395814000023Scopus ID: 2-s2.0-84995387907OAI: oai:DiVA.org:kth-204074DiVA, id: diva2:1085500
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QC 20170329

Tilgjengelig fra: 2017-03-29 Laget: 2017-03-29 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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