Progress in time-resolved photoemission electron microscopy at BL25SU, SPring-8

Radiofrequency field excitation of magnetic vortex core gyration

Takuo Ohkochi, Akinobu Yamaguchi, Masato Kotsugi, Hiroshi Hata, Minori Goto, Yukio Nozaki, Tetsuya Nakamura, Hitoshi Osawa, Toyohiko Kinoshita

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We developed a system to carry out time-resolved photoemission electron microscopy under RF excitation at the BL25SU beamline in SPring-8. RF fields of up to ∼42 MHz could be applied to microsized magnetic disks with a power loss of less than 0.9 dB. We performed time-resolved realspace observations of the gyrotropic motion of the magnetic vortex core in Ni81Fe 19 disks under an RF magnetic field. We confirmed that significant core gyrations can be seen only when the resonant frequency of the disks matches with the excitation frequency of the system.

Original languageEnglish
Article number128001
JournalJapanese Journal of Applied Physics
Volume51
Issue number12
DOIs
Publication statusPublished - 2012 Dec

Fingerprint

gyration
Photoemission
Electron microscopy
Natural frequencies
electron microscopy
Vortex flow
photoelectric emission
vortices
Magnetic fields
magnetic disks
power loss
excitation
resonant frequencies
magnetic fields

ASJC Scopus subject areas

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

Cite this

Progress in time-resolved photoemission electron microscopy at BL25SU, SPring-8 : Radiofrequency field excitation of magnetic vortex core gyration. / Ohkochi, Takuo; Yamaguchi, Akinobu; Kotsugi, Masato; Hata, Hiroshi; Goto, Minori; Nozaki, Yukio; Nakamura, Tetsuya; Osawa, Hitoshi; Kinoshita, Toyohiko.

In: Japanese Journal of Applied Physics, Vol. 51, No. 12, 128001, 12.2012.

Research output: Contribution to journalArticle

Ohkochi, Takuo ; Yamaguchi, Akinobu ; Kotsugi, Masato ; Hata, Hiroshi ; Goto, Minori ; Nozaki, Yukio ; Nakamura, Tetsuya ; Osawa, Hitoshi ; Kinoshita, Toyohiko. / Progress in time-resolved photoemission electron microscopy at BL25SU, SPring-8 : Radiofrequency field excitation of magnetic vortex core gyration. In: Japanese Journal of Applied Physics. 2012 ; Vol. 51, No. 12.
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