Capturing ultrafast magnetic dynamics by time-resolved soft X-ray magnetic circular dichroism

Kou Takubo, Kohei Yamamoto, Yasuyuki Hirata, Yuichi Yokoyama, Yuya Kubota, Shingo Yamamoto, Susumu Yamamoto, Iwao Matsuda, Shik Shin, Takeshi Seki, Koki Takanashi, Hiroki Wadati

Research output: Contribution to journalArticlepeer-review

Abstract

Experiments of time-resolved X-ray magnetic circular dichroism (Tr-XMCD) and resonant X-ray scattering at a beamline BL07LSU in SPring-8 with a time-resolution of under 50 ps are presented. A micro-channel plate is utilized for the Tr-XMCD measurements at nearly normal incidence both in the partial electron and total uorescence yield (PEY and TFY) modes at the L2;3 absorption edges of the 3d transition-metals in the soft X-ray region. The ultrafast photo-induced demagnetization within 50 ps is observed on the dynamics of a magnetic material of FePt thin film, having a distinct threshold of the photon density. The spectrum in the PEY mode is less-distorted both at the L2;3 edges compared with that in the TFY mode and has the potential to apply the sum rule analysis for XMCD spectra in pump-probed experiments.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - 2017 Jan 10

ASJC Scopus subject areas

  • General

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