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

Pingfan Gu, Yuxuan Peng, Shiqi Yang, Huan Wang, Shenyong Ye, Hanwen Wang, Yanping Li, Tianlong Xia (), Jinbo Yang () and Yu Ye ()
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Pingfan Gu: Peking University
Yuxuan Peng: Peking University
Shiqi Yang: 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
Jinbo Yang: Peking University
Yu Ye: Peking University

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: 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.

Date: 2025
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DOI: 10.1038/s41467-025-59690-6

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