English

Modulation of anomalous Hall angle in a magnetic topological semimetal

Mesoscale and Nanoscale Physics 2026-07-01 v1 Materials Science
Authors: Jinying Yang , Yanxing Shang , Xingchen Liu , Yibo Wang , Xuebin Dong , Qingqi Zeng , Meng Lv , Shen Zhang , Yang Liu , Binbin Wang , Hongxiang Wei , Yizheng Wu , Stuart Parkin , Gangqin Liu , Claudia Felser , Enke Liu , Baogen Shen
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Abstract

The anomalous Hall angle ({\theta}A) is a measure of the efficiency of converting a longitudinal driving current to a transverse spin-polarized Hall current. For anomalous Hall sensing, a large anomalous Hall angle can improve the sensitivity of magnetic field detection. However, modulation of this angle is challenging and magnetic materials typically have low angles of 0.1 to 3{\deg}. Here, we report modulation of the anomalous Hall angle in the magnetic Weyl semimetal Co3Sn2S2. We propose that the angle parameter tan{\theta}A can be formulated as a function of the product of electrical resistivity and anomalous Hall conductivity. Our scheme was utilized to demonstrate the modulation of tan{\theta}A up to a magnitude of 0.46, corresponding to an angle of around 25{\deg}. Microfabricated anomalous Hall devices using Fe-doped Co3Sn2S2 single-crystalline nanoflakes exhibit a high Hall sensitivity of 7028 {\mu}{\Omega}ucm/T and a magnetic field detectability of 23.5 nT/Hz0.5 at 1 Hz.

Keywords

anomalous Hall angle magnetic Weyl semimetal Co3Sn2S2 Hall sensitivity magnetic field detection nanoflakes

Cite

@article{arxiv.2607.00396,
  title  = {Modulation of anomalous Hall angle in a magnetic topological semimetal},
  author = {Jinying Yang and Yanxing Shang and Xingchen Liu and Yibo Wang and Xuebin Dong and Qingqi Zeng and Meng Lv and Shen Zhang and Yang Liu and Binbin Wang and Hongxiang Wei and Yizheng Wu and Stuart Parkin and Gangqin Liu and Claudia Felser and Enke Liu and Baogen Shen},
  journal= {arXiv preprint arXiv:2607.00396},
  year   = {2026}
}