Critical current and linewidth reduction in spin-torque nano-oscillators by delayed self-injection
Guru S. Khalsa, Mark D. Stiles, Julie Grollier
Based on theoretical models, the dynamics of spin torque nano-oscillators can be substantially modified by re-injecting the emitted signal to the input of the oscillator after some delay. Numerical simulations for vortex magnetic tunnel junctions show that this approach can decrease critical currents as much as 25 % and linewidths by a factor of 4 for reasonable parameters. Analytical calculations, which agree well with simulations, demonstrate that these results can be generalized to any kind of spin torque oscillator.
, Stiles, M.
and Grollier, J.
Critical current and linewidth reduction in spin-torque nano-oscillators by delayed self-injection, Applied Physics Letters, [online], https://doi.org/10.1063/1.4922740
(Accessed December 11, 2023)