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Room temperature chirality switching and detection in a helimagnetic MnAu2 thin film

Author

Listed:
  • Hidetoshi Masuda

    (Tohoku University)

  • Takeshi Seki

    (Tohoku University)

  • Jun-ichiro Ohe

    (Toho University)

  • Yoichi Nii

    (Tohoku University
    Japan Science and Technology Agency)

  • Hiroto Masuda

    (Tohoku University)

  • Koki Takanashi

    (Tohoku University
    Tohoku University
    Japan Atomic Energy Agency)

  • Yoshinori Onose

    (Tohoku University)

Abstract

Helimagnetic structures, in which the magnetic moments are spirally ordered, host an internal degree of freedom called chirality corresponding to the handedness of the helix. The chirality seems quite robust against disturbances and is therefore promising for next-generation magnetic memory. While the chirality control was recently achieved by the magnetic field sweep with the application of an electric current at low temperature in a conducting helimagnet, problems such as low working temperature and cumbersome control and detection methods have to be solved in practical applications. Here we show chirality switching by electric current pulses at room temperature in a thin-film MnAu2 helimagnetic conductor. Moreover, we have succeeded in detecting the chirality at zero magnetic fields by means of simple transverse resistance measurement utilizing the spin Berry phase in a bilayer device composed of MnAu2 and a spin Hall material Pt. These results may pave the way to helimagnet-based spintronics.

Suggested Citation

  • Hidetoshi Masuda & Takeshi Seki & Jun-ichiro Ohe & Yoichi Nii & Hiroto Masuda & Koki Takanashi & Yoshinori Onose, 2024. "Room temperature chirality switching and detection in a helimagnetic MnAu2 thin film," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46326-4
    DOI: 10.1038/s41467-024-46326-4
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