Spin-wave-beam driven synchronization of nanocontact spin-torque oscillators
Journal article, 2016

The synchronization of multiple nanocontact spin-torque oscillators (NC-STOs) is mediated by propagating spin waves (SWs). Although it has been shown that the Oersted field generated in the vicinity of the NC can dramatically alter the emission pattern of SWs, its role in the synchronization behaviour of multiple NCs has not been considered so far. Here we investigate the synchronization behaviour in multiple NC-STOs oriented either vertically or horizontally, with respect to the in-plane component of the external field. Synchronization is promoted (impeded) by the Oersted field landscape when the NCs are oriented vertically (horizontally) due to the highly anisotropic SW propagation. Not only is robust synchronization between two oscillators observed for separations larger than 1,000 nm, but synchronization of up to five oscillators, a new record, has been observed in the vertical array geometry. Furthermore, the synchronization can no longer be considered mutual in nature.

Author

Afshin Houshang

University of Gothenburg

Ezio Iacocca

University of Gothenburg

Philipp Dürrenfeld

University of Gothenburg

Sohrab R. Sani

Johan Åkerman

University of Gothenburg

Randy K. Dumas

University of Gothenburg

Nature Nanotechnology

1748-3387 (ISSN) 1748-3395 (eISSN)

Vol. 11 280-286

Subject Categories

Nano Technology

Condensed Matter Physics

DOI

10.1038/NNANO.2015.280

More information

Created

10/10/2017