Anisotropic Topological Hall Effect with Real and Momentum Space Berry Curvature in the Antiskrymion Hosting Heusler Compound Mn${}_{1.4}$PtSn

Abstract

The topological Hall effect (THE) is one of the key signatures of topologically non-trivial 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 Mn${}_{1.4}$PtSn, a non-centrosymmetric 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.

References in corpus (5)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Heusler 4.0: Tunable Materials
• Real-Space and Reciprocal-Space Berry Phases in the Hall Effect of Mn${}_{1-\mathrm{x}}$Fe${}_{\mathrm{x}}$Si
• Spin torque and force due to current for general spin textures

Cited by in corpus (7)

• Detection of antiskyrmions by topological Hall effect in Heusler compounds
• Large topological Hall effect in an easy-cone ferromagnet (Cr0.9B0.1)Te
• Antiskyrmions and their electrical footprint in crystalline mesoscale structures of Mn${}_{1.4}$PtSn
• In-Plane Magnetic Anisotropy and Large topological Hall Effect in Self-Intercalated Ferromagnet Cr1.61Te2
• Hybrid Bloch-Néel spiral states in Mn${}_{1.4}$PtSn probed by resonant soft x-ray scattering
• Bounds and anomalies of inhomogeneous anomalous Hall effects
• Accessing quasi-flat $\text{f}$-bands to harvest large Berry curvature in NdGaSi