@article{b3145e34030d4589a7a16a8faba59b08,
title = "Element-selectively tracking ultrafast demagnetization process in Co/Pt multilayer thin films by the resonant magneto-optical Kerr effect",
abstract = "We examined the photo-induced dynamics of ferromagnetic Co/Pt thin films exhibiting perpendicular magnetic anisotropy by means of the resonant polar magneto-optical Kerr effect with element specificity. The investigation was conducted at Pt N6,7 and Co M2,3 edges using an x-ray free electron laser. The obtained results showed a clear element dependence of photo-induced demagnetization time scales: sCo demag: = 80660 fs and sPtdemag: = 6406140 fs. This dependence is explained by the induced moment of the Pt atom by current flow from the Co layer through the interfaces. The observed magnetization dynamics can be attributed to the characteristics of photo-induced Co/Pt thin film phenomena including all-optical switching.",
author = "Kohei Yamamoto and Moussaoui, {Souliman El} and Yasuyuki Hirata and Susumu Yamamoto and Yuya Kubota and Shigeki Owada and Makina Yabashi and Takeshi Seki and Koki Takanashi and Iwao Matsuda and Hiroki Wadati",
note = "Funding Information: This work was partially supported by the Toray Science and Technology Grant of Toray Research Foundation, JSPS KAKENHI Grant Nos. 19H05824, 19H01816, 19K23430, and 17K14334, and MEXT Quantum Leap Flagship Program (MEXT Q-LEAP) Grant No. JPMXS0118068681. This work was supported by the SACLA Basic Development Program 2019–2020. The FEL experiments were performed at SACLA with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2019B8059, 2018B8040, 2018B8052, and 2017A8048). K.Y. acknowledges the support from the ALPS program of the University of Tokyo. Funding Information: This work was partially supported by the Toray Science and Technology Grant of Toray Research Foundation, JSPS KAKENHI Grant Nos. 19H05824, 19H01816, 19K23430, and 17K14334, and MEXT Quantum Leap Flagship Program (MEXT Q-LEAP) Grant No. JPMXS0118068681. This work was supported by the SACLA Basic Development Program 2019-2020. The FEL experiments were performed at SACLA with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2019B8059, 2018B8040, 2018B8052, and 2017A8048). K.Y. acknowledges the support from the ALPS program of the University of Tokyo. Publisher Copyright: {\textcopyright} 2017 BMJ Publishing Group. All rights reserved.",
year = "2020",
doi = "10.1063/5.0005393",
language = "English",
volume = "116",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "17",
}