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arXiv · 2607.23252

Current- and field-driven domain wall dynamics and chirality switching in a planar helimagnet

Roman Teslia·Oleksiy Kolezhuk
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Abstract

We study the effect of electric current and magnetic field on the dynamics of chirality in a helimagnet with a strong easy-plane anisotropy. Using a continuum theory, derived for a quasi-one-dimensional frustrated ferromagnet close to the Lifshitz point, we show that a domain wall connecting domains with opposite chiralities can be driven by the current via the dissipative (non-adiabatic) component of the spin-transfer torque. Further, it is demonstrated that the adiabatic part of the torque in the presence of a magnetic field breaks the symmetry of the effective magnetic potential energy with respect to the chirality. We show that the leading symmetry-breaking term arises in the third order in the magnetization gradient, and derive the conditions of the chirality switching. Our conclusions are supported by numerical spin-lattice simulations.

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Roman Teslia, Oleksiy Kolezhuk. 2026-07-25. Current- and field-driven domain wall dynamics and chirality switching in a planar helimagnet. https://arxiv.org/abs/2607.23252

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