TY - JOUR
T1 - Time and Spatially Resolved Hard X-Ray MCD Measurement on a Co/Pt Multilayer Dot Excited by Pulsed RF Field
AU - Kikuchi, Nobuaki
AU - Osawa, Hitoshi
AU - Suzuki, Motohiro
AU - Kitakami, Osamu
N1 - Funding Information:
This work was supported in part by JSPS KAKENHI under Grant 15H02244 and Grant 17K05028, in part by the Strategic Promotion of Innovative Research and Development from Japan Science and Technology Agency, and in part by Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials from MEXT. The synchrotron radiation experiments were carried out at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute as SPring-8 General Projects under Proposal 2013A1901, Proposal 2013B1921, Proposal 2014A1895, Proposal 2015A1262, Proposal 2015B1271, Proposal 2016A1318, Proposal 2016A1400, Proposal 2016B1221, and Proposal 2016B1958.
Publisher Copyright:
© 1965-2012 IEEE.
PY - 2018/2
Y1 - 2018/2
N2 - Understanding of magnetization behavior in magnetic nanostructures is a key issue for future magnetic/spintronic devices. Time-resolved X-ray magnetic circular dichroism (XMCD) is a powerful measurement technique with potential of nanometer spatial resolution, picosecond time resolution, and element selectivity. We have carried out time and spatially resolved XMCD microscopy measurement on a Co/Pt multilayer dot by detecting XMCD at the Pt L-{3} edge at BL39XU of SPring-8 using hard X-ray. Transient magnetic response of Co/Pt multilayer dots with diameter of 2.6~\mu \text{m} was investigated against pulsed RF field with frequency around 2.5 GHz and the maximum amplitude of about 400 Oe. By synchronizing excitation RF field pulse with X-ray pulses, the growth of magnetization precession of the induced Pt magnetic moment in the dot was clearly observed with sub-100 ps time resolution and submicrometer spatial resolution. The developed measurement setup can be applicable for a wide range of studies for time-resolved hard X-ray experiments.
AB - Understanding of magnetization behavior in magnetic nanostructures is a key issue for future magnetic/spintronic devices. Time-resolved X-ray magnetic circular dichroism (XMCD) is a powerful measurement technique with potential of nanometer spatial resolution, picosecond time resolution, and element selectivity. We have carried out time and spatially resolved XMCD microscopy measurement on a Co/Pt multilayer dot by detecting XMCD at the Pt L-{3} edge at BL39XU of SPring-8 using hard X-ray. Transient magnetic response of Co/Pt multilayer dots with diameter of 2.6~\mu \text{m} was investigated against pulsed RF field with frequency around 2.5 GHz and the maximum amplitude of about 400 Oe. By synchronizing excitation RF field pulse with X-ray pulses, the growth of magnetization precession of the induced Pt magnetic moment in the dot was clearly observed with sub-100 ps time resolution and submicrometer spatial resolution. The developed measurement setup can be applicable for a wide range of studies for time-resolved hard X-ray experiments.
KW - Ferromagnetic resonance
KW - magnetization dynamics
KW - spin waves
KW - X-ray magnetic circular dichroism (XMCD)
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U2 - 10.1109/TMAG.2017.2745211
DO - 10.1109/TMAG.2017.2745211
M3 - Article
AN - SCOPUS:85028546446
SN - 0018-9464
VL - 54
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 2
M1 - 8016610
ER -