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Autonomous and Non-Autonomous Dynamics of Spin Hall Auto-Oscillators

CNST Seminar Series

Andrei Slavin

Department of Physics
Oakland University

Abstract:

A novel type of spin-torque nano-oscillators driven by pure spin current generated via the spin Hall effect has been demonstrated recently. The study of the effects of external microwave signals on these Spin Hall oscillators (SHO) is reported. It is shown that SHO 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. It is found that the synchronization exhibits an apparent 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.  

Details:

Start Date: Friday, April 11, 2014 04:13 PM
End Date: Friday, April 11, 2014 04:13 PM
Location: 10:30AM, Bldg 217, Rm H107

Sponsor(s):

Robert McMichael, 301-975-5121