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The thin-film magnetic skyrmion is designed to interact with each other as nonlinear response, enabling collective magnetic morphology at the nonequilibrium state. We here explore the alternative nonlinear morphology of multiple skyrmions induced by the orthogonal two-current injections for the Pt/Co/Ir multilayer platforms. The global currents induce polarity-dependent driving and accumulation of skyrmions across the whole area of a Hall bar device. Once another local current is injected from a micro-meter width ports, dozens of skyrmions follow their polarity manners of the local injection, resulting in total modulations of skyrmion population governed by a pair of two-current polarities. Such massive morphology tuning at the nonlinear region indicates resemblances with a skyrmion Hall effect, where current-induced accumulation and depletion create the nonequilibrium distributions of skyrmions toward Hall deflections. Our findings propose an alternative controlling method of skyrmion population, threshold-like responses, providing analogies with neuromorphic architectures and other advanced information-processing technologies.

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  This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Sneha Yadav, Satoshi Sugimoto, Sandip Chatterjee, Kazuhito Tsukagoshi, Shinya Kasai; Long-range modulation of skyrmion population by local current injection. Appl. Phys. Lett. 6 July 2026; 129 (1): 012403 and may be found at https://doi.org/10.1063/5.0317950.

Keyword: spintronics, skyrmion, magneto-optic imaging, nonlinear physics

Date published: 2026-07-06

Publisher: AIP Publishing

Journal:

• Applied Physics Letters (ISSN: 00036951) vol. 129 issue. 1 012403

Funding:

• Japan Society for the Promotion of Science JP24K00952
• Japan Society for the Promotion of Science JP25K01298

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6435

First published URL: https://doi.org/10.1063/5.0317950

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Updated at: 2026-08-03 09:27:28 +0900

Published on MDR: 2026-08-03 10:29:00 +0900