期刊
PHYSICAL REVIEW B
卷 99, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.99.140406
关键词
-
资金
- ERC [742068]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [SPP 2137, 403502666]
The topological Hall effect (THE) is one of the key signatures of topologically nontrivial magnetic spin textures, wherein electrons feel an additional transverse voltage to the applied current. The magnitude of THE is often small compared to the anomalous Hall effect. Here, we find a large THE of 0.9 mu Omega cm that is of the same order of the anomalous Hall effect in the single-crystalline antiskyrmion-hosting Heusler compound Mn1.4PtSn, a noncentrosymmetric tetragonal compound. The THE is highly anisotropic and survives in the whole temperature range where the spin structure is noncoplanar (<170 K). The THE is zero above the spin reorientation transition temperature of 170 K, where the magnetization will have a collinear and ferromagnetic alignment. The large value of the THE entails a significant contribution from the momentum-space Berry curvature along with real-space Berry curvature, which has never been observed earlier.
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