Dzyaloshinskii-Moriya interaction energy density for various metal insertion layer in Pt/Co/X/Pt (X=Al, Ti, Ta, W, Pt) by using Brillouin light scattering

ORAL

Abstract

Interfacial Dzyaloshinskii-Moriya interaction (iDMI) is an important property for applying new type spintronics devices based on spin-orbit interaction phenomena. Especially, Brillouin light scattering (BLS) is powerful tools to directly observe the iDMI energy.1,2 In this study, we investigated the iDMI energy density for various atomic number using metal insertion layer by employing BLS measurement. All samples structures are Pt(2.5 nm)/Co(0.9 nm)/X(2.5 nm)/Pt(1.5 nm), X = (Al, Ti, Ta, W, Pt) which are deposited by magnetron sputtering. From systematic BLS measurement, we obtained asymmetric spin-wave propagation along to top (Stokes) and bottom (anti-Stokes) which can determine the iDMI energy density. Furthermore, the iDMI energy densities show consistent result with domain wall motion measurement considered the antisymmetric contribution such as chiral damping.3

References
1 J. Cho et al., Nat. Commun. 6, 7635 (2015).
2 N.-H. Kim et al., Appl. Phys. Lett. 107, 142408 (2015).
3 D.-Y. Kim et al., arXiv:1704.08751 (2017).

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Presenters

  • NAM-HUI KIM

    • Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology (DGIST)

Authors

  • NAM-HUI KIM

    • Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology (DGIST)

  • Dae-Yun Kim

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Yune-Seok Nam

    • Physics and Institute of Applied Physics, Seoul National University

  • Joo-Sung Kim

    • Physics and Institute of Applied Physics, Seoul National University

  • Hyeok-Cheol Choi

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Min-ho Park

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Yong-Keun Park

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Sug-Bong Choe

    • Department of Physics and Institute of Applied Physics, Seoul National University
    • Physics and Institute of Applied Physics, Seoul National University

  • Chun-Yeol You

    • Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology
    • Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology
    • Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology (DGIST)