Magnetic Vortex Excitation Frequencies and Eigenmodes in a Pair of Coupled Circular Dots

摘要

The low frequency dynamics of two coupled magnetic vortices oscillating in a pair of laterally patterned circular dots are calculated. The linearized Thiele equations of motion of the vortex core positions are applied to describe the dynamics. The main emphasis is put on the symmetry of the excited spin eigenmodes and the possibility to excite them by applying the variable driving magnetic fields in different directions. The importance of the high-order multipole terms in the interdot coupling integrals decomposition is underlined. Some recent experiments on the coupled magnetic vortex dynamics in patterned films are interpreted.