Phase locking in nanooscillator

Phase locking of dynamical modes in a nanomagnetic oscillator with a circularly spin-polarized current.
Jui-Hang Chang, Hao-Hsuan Chen, and Ching-Ray Chang, Yaowen Liu
Phys. Rev. B 84, 054457 (2011)

(a) The coordinate system of the device. The direction of the effective field heff is along the ez axis. (b) A schematic configuration of a spin valve with circularly spin-polarized current.