Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Electrical Measurement of Spin-Wave Interactions of Closely-Spaced Spin Transfer Nano-Oscillators



Matthew R. Pufall, Billy F. Riddle, Stephen E. Russek, John Kakareka, Jordan A. Katine


We have investigated the interaction mechanism between two nanocontact spin transfer oscillators made on the same magnetic spin valve multilayer. The oscillators phase lock when their precession frequencies are made similar, and a giant magnetoresistance (GMR) signal is detectable at one contact due to precession at the other. We show that cutting the magnetic mesa between the contacts with a focused ion beam modifies the contact outputs, eliminates the mutual phase locking, and strongly attenuates the GMR coupling, indicating that spin-waves, rather than magnetic fields, are the primary interaction mechanism.
Physical Review Letters


magnetodynamics, nanotechnology, oscillators, spin transfer torque, spintronics
Created August 23, 2006, Updated January 27, 2020