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Deflection of ferromagnetic and antiferromagnetic skyrmions at heterochiral interfaces

Tijdschriftbijdrage - e-publicatie

Devising magnetic nanostructures with spatially heterogeneous Dzyaloshinskii-Moriya interaction (DMI) is a promising pathway toward advanced confinement and control of magnetic skyrmions in potential devices. Here we discuss theoretically how a skyrmion interacts with a heterochiral interface using micromagnetic simulations and analytic arguments. We show that a heterochiral interface deflects the trajectory of ferromagnetic (FM) skyrmions, and that the extent of such deflection is tuned by the applied spin-polarized current and the difference in DMI across the interface. Further, we show that this deflection is characteristic of the FM skyrmion, and it is completely absent in the antiferromagnetic (AFM) case. In turn, we reveal that the AFM skyrmion achieves much higher velocities than its FM counterpart, yet experiences far stronger confinement in nanoengineered heterochiral tracks, which reinforces AFM skyrmions as a favorable choice for skyrmion-based devices.
Tijdschrift: Physical review B
ISSN: 2469-9969
Volume: 99
Jaar van publicatie:2019
Trefwoorden:A1 Journal article
BOF-keylabel:ja
BOF-publication weight:3
CSS-citation score:2
Auteurs:International
Authors from:Higher Education
Toegankelijkheid:Open