Layer-Specific Measurement of Ultrafast Spin Dynamics in GdFeCo Double Layer with Dielectric Interlayer

• Sato T.

  Graduate School of Science and Technology, Nihon University

• Shimizu R.

  Graduate School of Science and Technology, Nihon University

• Tsukamoto A.

  College of Science and Technology, Nihon University

• Itoh A.

  College of Science and Technology, Nihon University

抄録

  In recent years, the importance of understanding dynamic properties of magnetic materials is increasing. For designing dynamic responses in ultrafast optical control applications to spintronic devices, clarifying intra- and inter-layer energy dissipation process and spin dynamics in multilayered systems is an important issue. In this study, we investigated layer-specific measurement of ultrashort laser-induced ultrafast demagnetization and precession in magnetically and electrically decoupled GdFeCo double-layered film by all-optical pump-probe method. After laser excitation, demagnetization level of the first magnetic layer located at pump light incident side is about 5 times as large as another layer within ～ps range. Furthermore, from a time evolution of Faraday rotation in recovering processes, it is found that lattice temperature of each magnetic layer equilibrates at ～400 ps. Finally, independent precessional oscillation of each magnetic layer is clearly observed.

収録刊行物

• Journal of the Magnetics Society of Japan

  Journal of the Magnetics Society of Japan 38 (3-2), 115-118, 2014

  公益社団法人 日本磁気学会

キーワード

• heat-assisted magnetic recording
• spin dynamics
• multilayered film
• layer-specific measurement
• all-optical pump-probe method
• femtosecond pulse laser
• GdFeCo
• rare earth-transition metal alloy
• ferrimagnet

詳細情報

• CRID: 1390001205287603456
• NII論文ID: 130004502881
• DOI: 10.3379/msjmag.1402r013
• ISSN: 18822932
• ISSN: 18822924
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可