Dynamics of magnetostatically coupled vortices observed by time-resolved photoemission electron microscopy

Kuniaki Arai, Taichi Okuda, Keiki Fukumoto, Masato Kotsugi, Takuo Ohkouchi, Kenji Kodama, Takashi Kimura, Yuichi Haruyama, Tetsuya Nakamura, Tomohiro Matsushita, Hitoshi Osawa, Takayuki Muro, Shinji Matsui, Akito Kakizaki, Yoshichika Otani, Toyohiko Kinoshita

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12 Citations (Scopus)

Abstract

The dynamics of magnetostatically coupled vortices in a pair of ferromagnetic micron-sized disks has been observed in real space by pump-probe time-resolved photoemission electron microscopy. It is found that the dynamics of paired vortices is affected by a magnetic dipolar interaction. The displacement of a vortex core from its equilibrium position in the paired vortices during the supply of a magnetic field pulse is smaller than that in the isolated vortex, which is in qualitative agreement with micromagnetic simulation results. Unexpectedly, two eigenfrequencies of the paired vortices are different from each other. When the separation distance between the paired disks is shorter, the difference between the two eigenfrequencies is larger.

Original languageEnglish
Article number053001
JournalJapanese journal of applied physics
Volume50
Issue number5 PART 1
DOIs
Publication statusPublished - May 2011

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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