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.

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Cited by in corpus (15)

• Direct visualization of three-dimensional shape of skyrmion strings in a noncentrosymmetric magnet
• Topological Hall Effect and Emergent Skyrmion Crystal in Manganite-Iridate Oxide Interfaces
• Detection of antiskyrmions by topological Hall effect in Heusler compounds
• Tetragonal superstructure of the antiskyrmion hosting Heusler compound Mn1.4PtSn
• Large topological Hall effect in an easy-cone ferromagnet (Cr0.9B0.1)Te
• Topological Hall effect arising from the mesoscopic and microscopic non-coplanar magnetic structure in MnBi
• Signatures of a liquid-crystal transition in spin-wave excitations of skyrmions
• Anisotropic fractal magnetic domain pattern in bulk Mn${}_{1.4}$PtSn
• Role of magnetic exchange interactions in chiral-type Hall effects of epitaxial Mn${}_x$PtSn films
• Antiskyrmions and their electrical footprint in crystalline mesoscale structures of Mn${}_{1.4}$PtSn
• Critical Sample Aspect Ratio and Magnetic Field Dependence for Antiskyrmion Formation in Mn1.4PtSn Single-Crystals
• 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