Dynamics of coupled vortices in a pair of ferromagnetic disks

Details Dynamics of coupled vortices in a pair of ferromagnetic disks Dynamics of coupled vortices in a pair of ferromagnetic disks

2010-09-17

arxiv.org/abs/1009.3363v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, accepted

Scientific paper

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 experimental results indicate that the magnetostatically coupled pair of vortices behaves similar to a diatomic molecule with bonding and anti-bonding states. These findings lead to the possible extension of designing the magnonic band structure in a chain or an array of vortices.

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