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Concurrence of large anomalous Hall and topological Hall effects in ferromagnet Mn5Ge3

Junfa Lin1,2, Jianfeng Guo1,2,3, Huan Wang1,2,4, Xiaoyan Wang1,2, Sheng Xu1,2,5, Xiangyu Zeng1,2, Yu Zhang1,2, Zhihai Cheng1,2,6, and Tian-Long Xia1,2,6,7,*

  • *Contact author: tlxia@ruc.edu.cn

Phys. Rev. Materials 9, 124403 – Published 5 December, 2025

DOI: https://doi.org/10.1103/dcl4-znfd

Abstract

Magnetic materials are of great interest for investigating spin-dependent transport properties by analysis of the anomalous Hall effect (AHE) and topological Hall effect (THE). Here we report the concurrence of large AHE and THE over a wide temperature range up to room temperature in centrosymmetric Mn5Ge3. Unlike previous observation of AHE in ferromagnet, only the ordinary Hall effect captured by the two-band model is observed at low temperatures without AHE, which may be attributed to the opposite contribution from intrinsic and skew-scattering mechanisms. Remarkably, our results reveal two distinct sources of THE: noncollinear spin textures and skyrmion bubbles. When μ0H ‖ [100], a large THE is observed as a result of the chiral effect caused by the spin-flop process. A giant THE can also be detected when μ0H ‖ [001], which is mainly triggered by the skyrmion bubbles observed by magnetic force microscopy. Moreover, we find the topological Hall resistivity as high as 0.93 µΩcm at 290 K, highlighting Mn5Ge3 as a promising candidate for future device applications.

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