The coupling of two nonidentical magnetic nanodisks, ie, with different vortex gyrotropic
frequencies, is studied. From the analytical approach, the interactions between the
nanodisks along x and y directions (the coupling integrals) were obtained as a function of
distance. From the numerical solution of Thiele's equation, we derived the eigenfrequencies
of the vortex cores as a function of distance. The motion of the two vortex cores and,
consequently, the time dependence of the total magnetization M (t) were derived both using …