Colossal topological Hall effect at the transition between isolated and lattice-phase interfacial skyrmions

Abstract

The topological Hall effect is used extensively to study chiral spin textures in various materials. However, the factors controlling its magnitude in technologically-relevant thin films remain uncertain. Using variable temperature magnetotransport and real-space magnetic imaging in a series of Ir/Fe/Co/Pt heterostructures, here we report that the chiral spin fluctuations at the phase boundary between isolated skyrmions and a disordered skyrmion lattice result in a power-law enhancement of the topological Hall resistivity by up to three orders of magnitude. Our work reveals the dominant role of skyrmion stability and configuration in determining the magnitude of the topological Hall effect.

arXiv comment10 pages, 3 figures

References in corpus (19)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
• Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
• Skyrmions at room temperature : From magnetic thin films to magnetic multilayers
• Tunable Room Temperature Magnetic Skyrmions in Ir/Fe/Co/Pt Multilayers
• Interface-driven topological Hall effect in SrRuO${}_3$-SrIrO${}_3$ bilayer
• The properties of isolated chiral skyrmions in thin magnetic films
• Critical Exponents of the Classical 3D Heisenberg Model: A Single-Cluster Monte Carlo Study
• Giant topological Hall effect in correlated oxide thin films
• Topological Hall effect at above room temperature in heterostructures composed of a magnetic insulator and a heavy metal
• Chiral magnetic textures in Ir/Fe/Co/Pt multilayers: Evolution and topological Hall signature
• Spin chirality fluctuation in two-dimensional ferromagnets with perpendicular anisotropy
• Discrete Hall resistivity contribution from Néel skyrmions in multilayer nanodiscs
• Helical magnetic structure and the anomalous and topological Hall effects in epitaxial B20 Fe${}_{1-y}$Co${}_y$Ge films
• General theory of topological Hall effect in systems with chiral spin textures
• Scattering on magnetic skyrmion in the non-adiabatic approximation
• Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets
• Stray field signatures of Néel textured skyrmions in Ir/Fe/Co/Pt multilayer films
• Colossal enhancement of spin-chirality-related Hall effect by thermal fluctuation

Cited by in corpus (15)

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• Distinguishing two-component anomalous Hall effect from topological Hall effect
• Controlled Ordering of Room-Temperature Magnetic Skyrmions in a Polar Van der Waals Magnet
• Colloquium: Quantum Properties and Functionalities of Magnetic Skyrmions
• Skyrmion-size dependence of the topological Hall effect: A real-space calculation
• Kagome lattice promotes chiral spin fluctuations
• Topological orbital Hall effect caused by skyrmions and antiferromagnetic skyrmions
• Densely packed skyrmions stabilized at zero magnetic field by indirect exchange coupling in multilayers
• Peculiar magnetic and magneto-transport properties in a non-centrosymmetric self-intercalated van der Waals ferromagnet Cr5Te8
• Spin order and dynamics in the topological rare-earth germanide semimetals
• Three-dimensional topological orbital Hall effect caused by magnetic hopfions
• Emergent giant topological Hall effect in twisted Fe3GeTe2 metallic system
• Bounds and anomalies of inhomogeneous anomalous Hall effects
• Angular dependence of hump-shape Hall Effects for distinguishing between Karplus-Luttinger and Geometrical Origins
• Magneto-Optical Analysis of Magnetic Anisotropy in Ultrathin Tm${}_3$Fe${}_5$O${}_{12}$/Pt Bilayers