Journal
NATURE COMMUNICATIONS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms4179
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Funding
- Deutsche Forschungsgemeinschaft (DFG)
- DARPA MTO/MESO [N66001-11-1-4114]
- US Army TARDEC
- RDECOM
- DARPA
- NSF [ECCS-1001815, ECCS-1218419, ECCS-1305586, DMR-1015175]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1218414] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1305586, 1218419] Funding Source: National Science Foundation
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Recently, a novel type of spin-torque nano-oscillators driven by pure spin current generated via the spin Hall effect was demonstrated. Here we report the study of the effects of external microwave signals on these oscillators. Our results show that they can be efficiently synchronized by applying a microwave signal at approximately twice the frequency of the auto-oscillation, which opens additional possibilities for the development of novel spintronic devices. We find that the synchronization exhibits a threshold determined by magnetic fluctuations pumped above their thermal level by the spin current, and is significantly influenced by the nonlinear self-localized nature of the auto-oscillatory mode.
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