Dynamics of coupled vortices in a pair of ferromagnetic disks

Satoshi Sugimoto, Yasuhiro Fukuma, Shinya Kasai, Takashi Kimura, Anjan Barman, Yoshichika Otani

Research output: Contribution to journalArticle

87 Citations (Scopus)

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.

Original languageEnglish
Article number197203
JournalPhysical Review Letters
Volume106
Issue number19
DOIs
Publication statusPublished - May 13 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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