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Dynamics of Coupled Vortices in a Pair of Ferromagnetic Disks

Dynamics of Coupled Vortices in a Pair of Ferromagnetic Disks

We here experimentally demonstrate that coupled gyration modes can be resonantly excited primarily by the ac current in a pair of ferromagnetic disks with varied separating distance. The sole gyrotropic mode clearly splits into a higher and a lower frequency modes for different configurations of polarities via dipolar interaction. These …