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

doi:10.1143/JJAP.50.053001

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

Condensed Matter Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	053001
Journal	Japanese journal of applied physics
Volume	50
Issue number	5 PART 1
DOIs	https://doi.org/10.1143/JJAP.50.053001
Publication status	Published - May 2011

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy(all)

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Arai, K., Okuda, T., Fukumoto, K., Kotsugi, M., Ohkouchi, T., Kodama, K., Kimura, T., Haruyama, Y., Nakamura, T., Matsushita, T., Osawa, H., Muro, T., Matsui, S., Kakizaki, A., Otani, Y., & Kinoshita, T. (2011). Dynamics of magnetostatically coupled vortices observed by time-resolved photoemission electron microscopy. Japanese journal of applied physics, 50(5 PART 1), Article 053001. https://doi.org/10.1143/JJAP.50.053001

Arai, K, Okuda, T, Fukumoto, K, Kotsugi, M, Ohkouchi, T, Kodama, K, Kimura, T, Haruyama, Y, Nakamura, T, Matsushita, T, Osawa, H, Muro, T, Matsui, S, Kakizaki, A, Otani, Y & Kinoshita, T 2011, 'Dynamics of magnetostatically coupled vortices observed by time-resolved photoemission electron microscopy', Japanese journal of applied physics, vol. 50, no. 5 PART 1, 053001. https://doi.org/10.1143/JJAP.50.053001

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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.",

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

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AU - Arai, Kuniaki

AU - Okuda, Taichi

AU - Fukumoto, Keiki

AU - Kotsugi, Masato

AU - Ohkouchi, Takuo

AU - Kodama, Kenji

AU - Kimura, Takashi

AU - Haruyama, Yuichi

AU - Nakamura, Tetsuya

AU - Matsushita, Tomohiro

AU - Osawa, Hitoshi

AU - Muro, Takayuki

AU - Matsui, Shinji

AU - Kakizaki, Akito

AU - Otani, Yoshichika

AU - Kinoshita, Toyohiko

PY - 2011/5

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N2 - 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.

AB - 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.

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

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