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

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.