TY - JOUR
T1 - Progress in time-resolved photoemission electron microscopy at BL25SU, SPring-8
T2 - Radiofrequency field excitation of magnetic vortex core gyration
AU - Ohkochi, Takuo
AU - Yamaguchi, Akinobu
AU - Kotsugi, Masato
AU - Hata, Hiroshi
AU - Goto, Minori
AU - Nozaki, Yukio
AU - Nakamura, Tetsuya
AU - Osawa, Hitoshi
AU - Kinoshita, Toyohiko
PY - 2012/12
Y1 - 2012/12
N2 - 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.
AB - 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.
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U2 - 10.1143/JJAP.51.128001
DO - 10.1143/JJAP.51.128001
M3 - Article
AN - SCOPUS:84872576295
SN - 0021-4922
VL - 51
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 12
M1 - 128001
ER -