Mutual phase-locking of microwave spin torque nano-oscillators

Shehzaad Kaka (), Matthew R. Pufall, William H. Rippard, Thomas J. Silva, Stephen E. Russek and Jordan A. Katine
Additional contact information
Shehzaad Kaka: National Institute of Standards and Technology
Matthew R. Pufall: National Institute of Standards and Technology
William H. Rippard: National Institute of Standards and Technology
Thomas J. Silva: National Institute of Standards and Technology
Stephen E. Russek: National Institute of Standards and Technology
Jordan A. Katine: Hitachi San Jose Research Center

Nature, 2005, vol. 437, issue 7057, 389-392

Abstract: Nanomagnets in a spin Magnetic thin film multilayers have many applications for data storage, semiconductor memories and as sensors. The spin-torque effect, which uses an electric current to rapidly spin the material's magnetic constituents, could lead to new applications for this technology at ever-smaller scales: think in terms of a radio set the size of a bacterium. Two groups have now independently achieved synchronization — or phase-locking — of the magnetic oscillations of two such nanomagnets placed just 400–500 nm apart. These oscillations can generate microwave signals for telecommunication and an array of these nanomagnets could also act as a receiver, enabling microchips to communicate without being in physical contact, greatly enhancing computing speed.

Date: 2005
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DOI: 10.1038/nature04035

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