Large topological Hall effect in a geometrically frustrated kagome magnet Fe$_3$Sn$_2$

Hang Li; Bei Ding; Jie Chen; Zefang Li; Zhipeng Hou; Enke Liu; Hongwei Zhang; Xuekui Xi; Guangheng Wu; Wenhong Wang

doi:10.1063/1.5088173

Large topological Hall effect in a geometrically frustrated kagome magnet Fe$_3$Sn$_2$

Materials Science 2019-11-28 v1 Strongly Correlated Electrons

Authors: Hang Li , Bei Ding , Jie Chen , Zefang Li , Zhipeng Hou , Enke Liu , Hongwei Zhang , Xuekui Xi , Guangheng Wu , Wenhong Wang

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Abstract

We report on the observation of a large topological Hall effect (THE) over a wide temperature region in a geometrically frustrated Fe3Sn2 magnet with a kagome-bilayer structure. We found that the magnitude of the THE resistivity increases with temperature and reaches -0.875 {\mu}{\Omega}.cm at 380 K. Moreover, the critical magnetic fields with the change of THE are consistent with the magnetic structure transformation, which indicates that the real-space fictitious magnetic field is proportional to the formation of magnetic skyrmions in Fe3Sn2. The results strongly suggest that the large THE originates from the topological magnetic spin textures and may open up further research opportunities in exploring emergent phenomena in kagome materials.

Keywords

topological hall effect kagome magnet fe3sn2 geometric frustration magnetic skyrmions topological spin texture

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@article{arxiv.1911.12214,
  title  = {Large topological Hall effect in a geometrically frustrated kagome magnet Fe$_3$Sn$_2$},
  author = {Hang Li and Bei Ding and Jie Chen and Zefang Li and Zhipeng Hou and Enke Liu and Hongwei Zhang and Xuekui Xi and Guangheng Wu and Wenhong Wang},
  journal= {arXiv preprint arXiv:1911.12214},
  year   = {2019}
}

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18 pages, 4 figures and Supplementary materials

Large topological Hall effect in a geometrically frustrated kagome magnet Fe$_3$Sn$_2$

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