Discretized Topological Hall Effect Emerging from Skyrmions in Constricted Geometry

Abstract

We investigate the skyrmion formation process in nano-structured FeGe Hall-bar devices by measurements of topological Hall effect, which extracts the winding number of a spin texture as an emergent magnetic field. Step-wise profiles of topological Hall resistivity are observed in the course of varying the applied magnetic field, which arise from instantaneous changes in the magnetic nano-structure such as creation, annihilation, and jittering motion of skyrmions. The discrete changes in topological Hall resistivity demonstrate the quantized nature of emergent magnetic flux inherent in each skyrmion, which had been indistinguishable in many-skyrmion systems on a macroscopic scale.

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Cited by in corpus (12)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
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• Dimensional Crossover Induced Topological Hall Effect in a Magnetic Topological Insulator
• Interpretation of experimental evidence of the topological Hall effect
• Topological Hall and Spin Hall Effects in Disordered Skyrmionic Textures
• Detection of antiskyrmions by topological Hall effect in Heusler compounds
• Observation of Topological Hall Effect and Signature of Room Temperature Antiskyrmions in Mn-Ni-Ga D2d Heusler magnets
• Large topological Hall effect in an easy-cone ferromagnet (Cr0.9B0.1)Te
• Molecular Beam Epitaxy Growth of [CrGe/MnGe/FeGe] Superlattices: Toward Artificial B20 Skyrmion Materials with Tunable Interactions
• Tuning of topological properties in the strongly correlated antiferromagnet Mn${}_3$Sn via Fe doping
• Tuning of Electrical, Magnetic, and Topological Properties of Magnetic Weyl Semimetal Mn${}_{3+x}$Ge by Fe doping