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Current-driven fast magnetic octupole domain-wall motion in noncollinear antiferromagnets

Author

Listed:
  • Mingxing Wu

    (The University of Tokyo
    RIKEN)

  • Taishi Chen

    (The University of Tokyo
    Southeast University
    University of Tokyo)

  • Takuya Nomoto

    (University of Tokyo)

  • Yaroslav Tserkovnyak

    (University of California, Los Angeles)

  • Hironari Isshiki

    (The University of Tokyo
    Japan Science and Technology Agency (JST))

  • Yoshinobu Nakatani

    (University of Electro-Communications)

  • Tomoya Higo

    (The University of Tokyo
    University of Tokyo
    Japan Science and Technology Agency (JST))

  • Takahiro Tomita

    (The University of Tokyo
    University of Tokyo
    Japan Science and Technology Agency (JST))

  • Kouta Kondou

    (RIKEN
    Japan Science and Technology Agency (JST))

  • Ryotaro Arita

    (RIKEN
    University of Tokyo
    Japan Science and Technology Agency (JST))

  • Satoru Nakatsuji

    (The University of Tokyo
    University of Tokyo
    Japan Science and Technology Agency (JST)
    University of Tokyo)

  • Yoshichika Otani

    (The University of Tokyo
    RIKEN
    Japan Science and Technology Agency (JST)
    University of Tokyo)

Abstract

Antiferromagnets (AFMs) have the natural advantages of terahertz spin dynamics and negligible stray fields, thus appealing for use in domain-wall applications. However, their insensitive magneto-electric responses make controlling them in domain-wall devices challenging. Recent research on noncollinear chiral AFMs Mn3X (X = Sn, Ge) enabled us to detect and manipulate their magnetic octupole domain states. Here, we demonstrate a current-driven fast magnetic octupole domain-wall (MODW) motion in Mn3X. The magneto-optical Kerr observation reveals the Néel-like MODW of Mn3Ge can be accelerated up to 750 m s-1 with a current density of only 7.56 × 1010 A m-2 without external magnetic fields. The MODWs show extremely high mobility with a small critical current density. We theoretically extend the spin-torque phenomenology for domain-wall dynamics from collinear to noncollinear magnetic systems. Our study opens a new route for antiferromagnetic domain-wall-based applications.

Suggested Citation

  • Mingxing Wu & Taishi Chen & Takuya Nomoto & Yaroslav Tserkovnyak & Hironari Isshiki & Yoshinobu Nakatani & Tomoya Higo & Takahiro Tomita & Kouta Kondou & Ryotaro Arita & Satoru Nakatsuji & Yoshichika , 2024. "Current-driven fast magnetic octupole domain-wall motion in noncollinear antiferromagnets," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48440-9
    DOI: 10.1038/s41467-024-48440-9
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    References listed on IDEAS

    as
    1. Hanshen Tsai & Tomoya Higo & Kouta Kondou & Takuya Nomoto & Akito Sakai & Ayuko Kobayashi & Takafumi Nakano & Kay Yakushiji & Ryotaro Arita & Shinji Miwa & Yoshichika Otani & Satoru Nakatsuji, 2020. "Electrical manipulation of a topological antiferromagnetic state," Nature, Nature, vol. 580(7805), pages 608-613, April.
    2. Hang Xie & Xin Chen & Qi Zhang & Zhiqiang Mu & Xinhai Zhang & Binghai Yan & Yihong Wu, 2022. "Magnetization switching in polycrystalline Mn3Sn thin film induced by self-generated spin-polarized current," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    3. Satoru Nakatsuji & Naoki Kiyohara & Tomoya Higo, 2015. "Large anomalous Hall effect in a non-collinear antiferromagnet at room temperature," Nature, Nature, vol. 527(7577), pages 212-215, November.
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