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Condensed Matter > Mesoscale and Nanoscale Physics
Title: Predicted Multiple Walker Breakdowns for Current-Driven Domain-Wall Motion in Antiferromagnets
(Submitted on 16 Dec 2023 (v1), last revised 23 Apr 2024 (this version, v2))
Abstract: We theoretically discover possible emergence of reentrant Walker breakdowns for current-driven domain walls in layered antiferromagnets in striking contrast to the unique Walker breakdown in ferromagnets. We reveal that the Lorentz contraction of domain-wall width in antiferromagnets gives rise to nonlinear current-dependence of the wall velocity and the predicted multiple Walker breakdowns. The dominant efficiency of the current-induced staggered spin-orbit torque over the spin-transfer torque to drive the domain-wall motion is also demonstrated. These findings are expected to be observed in synthetic antiferromagnets experimentally and provide an important contribution to the growing research field of antiferromagnetic spintronics.
Submission history
From: Mu-Kun Lee [view email][v1] Sat, 16 Dec 2023 06:05:19 GMT (1168kb)
[v2] Tue, 23 Apr 2024 02:27:48 GMT (2502kb)
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