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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/116

Title: Dynamics of Coupled Vortices in a Pair of Ferromagnetic Disks
Authors: Sugimoto, Satoshi
Fukuma, Yasuhiro
Kasai, Shinya
Kimura, Takashi
Barman, Anjan
Otani, YoshiChika
Issue Date: 2011
Publisher: Phys. Rev. Lett.
Citation: S. Sugimoto, Y. Fukuma, S. Kasai, T. Kimura, A. Barman and Y. Otani, Dynamics of coupled vortices in a pair of ferromagnetic disks, Phys. Rev. Lett., 2011, 106, 197203
Abstract: We here experimentally demonstrate that gyration modes of coupled vortices can be resonantly excited primarily by the ac current in a pair of ferromagnetic disks with variable separation. The sole gyration mode clearly splits into higher and lower frequency modes via dipolar interaction, where the main mode splitting is due to a chirality sensitive phase difference in gyrations of the coupled vortices, whereas the magnitude of the splitting is determined by their polarity configuration. These experimental results show that the coupled pair of vortices behaves similar to a diatomic molecule with bonding and antibonding states, implying a possibility for designing the magnonic band structure in a chain or an array of magnetic vortex oscillators.
URI: http://hdl.handle.net/123456789/116
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