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Title: The evolution of skyrmions in Ir/Fe/Co/Pt multilayers and their topological Hall signature
Authors: Raju, Masapogu
Panagopoulos, Christos
Yagil, A.
Soumyanarayanan, Anjan
Tan, Anthony K. C.
Almoalem, A.
Ma, Fusheng
Auslaender, O. M.
Keywords: Science::Physics
Magnetic Properties and Materials
Issue Date: 2019
Source: Raju, M., Yagil, A., Soumyanarayanan, A., Tan, A. K. C., Almoalem, A., Ma, F., . . . Panagopoulos, C. (2019). The evolution of skyrmions in Ir/Fe/Co/Pt multilayers and their topological Hall signature. Nature Communications, 10, 696-. doi:10.1038/s41467-018-08041-9
Series/Report no.: Nature Communications
Abstract: The topological Hall effect (THE) is the Hall response to an emergent magnetic field, a manifestation of the skyrmion Berry-phase. As the magnitude of THE in magnetic multilayers is an open question, it is imperative to develop comprehensive understanding of skyrmions and other chiral textures, and their electrical fingerprint. Here, using Hall-transport and magnetic-imaging in a technologically viable multilayer film, we show that topological-Hall resistivity scales with the isolated-skyrmion density over a wide range of temperature and magnetic-field, confirming the impact of the skyrmion Berry-phase on electronic transport. While we establish qualitative agreement between the topological-Hall resistivity and the topological-charge density, our quantitative analysis shows much larger topological-Hall resistivity than the prevailing theory predicts for the observed skyrmion density. Our results are fundamental for the skyrmion-THE in multilayers, where interfacial interactions, multiband transport and non-adiabatic effects play an important role, and for skyrmion applications relying on THE.
DOI: 10.1038/s41467-018-08041-9
Rights: © 2019 The Author(s) (Nature Publishing Group). Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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