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Probing the anomalous Hall transport and magnetic reversal of quasi-two-dimensional antiferromagnet Co1/3NbS2

Author

Listed:
  • Pingfan Gu

    (Peking University
    Nanjing University of Science and Technology)

  • Yuxuan Peng

    (Peking University)

  • Shiqi Yang

    (Peking University
    Peking University)

  • Huan Wang

    (Renmin University of China)

  • Shenyong Ye

    (Peking University)

  • Hanwen Wang

    (Liaoning Academy of Materials)

  • Yanping Li

    (Peking University)

  • Tianlong Xia

    (Renmin University of China
    Renmin University of China
    Renmin University of China)

  • Jinbo Yang

    (Peking University)

  • Yu Ye

    (Peking University
    Liaoning Academy of Materials
    Collaboration International Center of Quantum Matter)

Abstract

The recent discovery of anomalous Hall effect (AHE) in non-collinear antiferromagnets offers a promising platform for developing ultra-compact, ultrafast, and low-power antiferromagnetic spintronics, as well as for the in-depth investigation of topological physics. One notable example is the quasi-two-dimensional antiferromagnet Co1/3NbS2, which exhibits a large spontaneous Hall effect with compensated magnetization. Here, we report the observation of a large spontaneous Nernst effect in exfoliated Co1/3NbS2 flakes. By analyzing the temperature- and field-dependent thermoelectric and transport phenomena, we confirm the intrinsic k-space Berry curvature as the origin of the spontaneous Hall effect. Reflective magnetic circular dichroism measurements further reveal the presence of non-collinear antiferromagnetic domains in Co1/3NbS2. Combined with electrical transport measurements, we elucidate the distinct magnetic reversal mechanisms between bulk and exfoliated samples. Our study provides a comprehensive phenomenological understanding of the magnetic and transport properties of Co1/3NbS2, laying the groundwork for further exploration of the underlying physics and potential applications of two-dimensional non-collinear magnets.

Suggested Citation

  • Pingfan Gu & Yuxuan Peng & Shiqi Yang & Huan Wang & Shenyong Ye & Hanwen Wang & Yanping Li & Tianlong Xia & Jinbo Yang & Yu Ye, 2025. "Probing the anomalous Hall transport and magnetic reversal of quasi-two-dimensional antiferromagnet Co1/3NbS2," Nature Communications, Nature, vol. 16(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59690-6
    DOI: 10.1038/s41467-025-59690-6
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