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

Raju, M.; Petrović, A. P.; Yagil, A.; Denisov, K. S.; Duong, N. K.; Göbel, B.; Şaşıoğlu, E.; Auslaender, O. M.; Mertig, I.; Rozhansky, I. V.; Panagopoulos, C.

doi:10.1038/s41467-021-22976-6

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

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Göbel, B.
External Organizations;
International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1038/s41467-021-22976-6
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Citation

Raju, M., Petrović, A. P., Yagil, A., Denisov, K. S., Duong, N. K., Göbel, B., et al. (2021). Colossal topological Hall effect at the transition between isolated and lattice-phase interfacial skyrmions. Nature Communications, 12: 2758. doi:10.1038/s41467-021-22976-6.

Cite as: https://hdl.handle.net/21.11116/0000-000A-DC50-4

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.