Speaker
Description
In this work, we study how oscillator synchronization can be used to optimize the domain wall (DW) dynamics in magnetic bilayers with perpendicular anisotropy. We show that dipolarly coupled DWs reach larger velocities as compared to isolated walls when the two chiral walls form a magnetic flux closing object. While this situation is easily maintained in a stationary motion regime, the observation of large velocities in the precessional regime imply that the DWs internal oscillations are synchronized, even when their natural frequencies are different. Using an additional in-plane magnetic field, the system can be tuned and synchronization is observed over a finite range of detuning. Using simulations, a rich variety of states is described, from perfect synchronization to complete separation.