Progress in Time-Resolved Photoemission Electron Microscopy at BL25SU, SPring-8: Radiofrequency Field Excitation of Magnetic Vortex Core Gyration

Progress in Time-Resolved Photoemission Electron Microscopy at BL25SU, SPring-8: Radiofrequency Field Excitation of Magnetic Vortex Core Gyration
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BL25SU、SPring-8 时间分辨光电显微镜的进展:磁涡旋核心回转的射频场激发

DOI:
10.1143/jjap.51.128001
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发表时间:
2012
影响因子:
1.5
通讯作者:
T. Kinoshita
T. Kinoshita
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
T. Ohkochi;A. Yamaguchi;M. Kotsugi;H. Hata;M. Goto;Y. Nozaki;Tetsuya Nakamura;H. Osawa;T. Kinoshita

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我们开发了一种系统,可在 SPring-8 中的 BL25SU 光束线的 RF 激励下进行时间分辨光电子显微镜检查。高达 ~42 MHz 的射频场可应用于微型磁盘,功率损耗小于 0.9 dB。我们对 RF 磁场下 Ni81Fe19 圆盘中磁涡核的陀螺运动进行了时间分辨实空间观测。我们证实,只有当圆盘的谐振频率与系统的激励频率匹配时,才能看到显着的核心回转。
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 real-space observations of the gyrotropic motion of the magnetic vortex core in Ni81Fe19 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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