Vortex dynamics mediated by exchange coupling in permalloy double disks

▸ Dynamics of vortices in double Permalloy disks coupled with a bridge are studied. ▸ Three types of equilibrium configurations are observed for the model. ▸ Oscillation of the cores depends on the magnetic configuration of the double disks. ▸ Variation of oscillating frequency with bridge length depends on polarity combination. ▸ Oscillating frequency decreases with the increasing of the bridge width.