Spin chirality fluctuation in two-dimensional ferromagnets with perpendicular magnetic anisotropy

Wenbo Wang, Matthew W. Daniels, Zhaoliang Liao, Yifan Zhao, Jun Wang, Gertjan Koster, Guus Rijnders, Cui Zu Chang, Di Xiao, Weida Wu*

*Corresponding author for this work

Research output: Contribution to journalLetterAcademicpeer-review

6 Citations (Scopus)

Abstract

Non-coplanar spin textures with scalar spin chirality can generate an effective magnetic field that deflects the motion of charge carriers, resulting in a topological Hall effect (THE)1–3. However, spin chirality fluctuations in two-dimensional ferromagnets with perpendicular magnetic anisotropy have not been considered so far. Here, we report evidence of spin chirality fluctuations by probing the THE above the Curie temperature in two different ferromagnetic ultra-thin films, SrRuO3 and V-doped Sb2Te3. The temperature, magnetic field, thickness and carrier-type dependence of the THE signal, along with Monte Carlo simulations, suggest that spin chirality fluctuations are a common phenomenon in two-dimensional ferromagnets with perpendicular magnetic anisotropy. Our results open a path for exploring spin chirality with topological Hall transport in two-dimensional magnets and beyond4–7.

Original languageEnglish
Pages (from-to)1054-1059
Number of pages6
JournalNature materials
Volume18
Issue number10
Early online date12 Aug 2019
DOIs
Publication statusPublished - 1 Oct 2019

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