Dynamics of coupled vortices in a pair of ferromagnetic disks

Abstract

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.

4 pages, 4 figures, accepted

References in corpus (5)

• Magnetic Vortex Resonance in Patterned Ferromagnetic Dots
• Current-driven resonant excitation of magnetic vortex
• Soliton pair dynamics in patterned ferromagnetic ellipses
• Time-Resolved X-ray Microscopy of Spin-Torque-Induced Magnetic Vortex Gyration
• Collective modes for an array of magnetic dots in the vortex state

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