Origin of Magnetization Auto-Oscillations in Constriction-Based Spin Hall Nano-Oscillators

Abstract

Spin-based nano-oscillators are tiny devices that convert direct electrical current to microwave signals. One particular variety offers an amazing propensity for robust long-range synchronization, which is very interesting for next-generation rf applications and neuromorphic computing. State-of-the-art micromagnetic simulations reveal that, for these oscillators, the spatial extent of magnetization dynamics can be dramatically altered with an applied magnetic field, with spatial symmetry breaking appearing only in strong oblique fields. These findings allow sensible engineering of the couplings in complex networks of such oscillators, to promote brain-inspired spintronic computing.