Nonlinear motion of coupled magnetic vortices in ferromagnetic/nonmagnetic/ferromagnetic trilayer

We have investigated a coupled motion of two parallel vortex cores in ferromagnetic/nonmagnetic/ferromagnetic trilayer cylinders by means of micromagnetic simulation. Dynamic motion of two vortices with parallel and antiparallel relative chiralities of curling spins around the vortex cores have been examined after excitation by 1 ns pulsed external field, revealing a nontrivial coupled vortices motion. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3243985]