Femtosecond resonant magneto-optical Kerr effect measurement on an ultrathin magnetic film in a soft X-ray free electron laser

Shingo Yamamoto, Yuya Kubota, Kohei Yamamoto, Yoshinobu Takahashi, Kohei Maruyama, Yuta Suzuki, Rei Hobara, Masami Fujisawa, Daiki Oshima, Shigeki Owada, Tadashi Togashi, Kensuke Tono, Makina Yabashi, Yasuyuki Hirata, Susumu Yamamoto, Masato Kotsugi, Hiroki Wadati, Takeshi Kato, Satoshi Iwata, Shik ShinIwao Matsuda

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Time-resolved magneto-optical Kerr effect (MOKE) measurement was demonstrated on a sample of the Au/Fe/Au heterostructure with the Fe layer of 0.35 nm thickness under Fe M-edge resonance condition. An ultrabrilliant free electron laser (FEL) in the soft X-ray range was facilitated for the detection of transient signals of resonant MOKE from the ultrathin Fe film. A variation in the Kerr rotation angle was successfully observed on the femtosecond timescale. This technique enables us to reveal the transient magnetization dynamics of such a-few-monolayer magnetic films, which promote the development of spintronic devices.

Original languageEnglish
Article number09TD02
JournalJapanese journal of applied physics
Volume57
Issue number9
DOIs
Publication statusPublished - 2018 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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