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

Roman Teslia and Oleksiy Kolezhuk

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Phys. Rev. B 114, 214408 – Published 9 October, 2026

DOI: https://doi.org/10.1103/nf2n-tsrx

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 (nonadiabatic) 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 for chirality switching. Our conclusions are supported by numerical spin-lattice simulations.

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Phys. Rev. B 114, 214408– Published 9 October, 2026
  • Received 25 July 2026
  • Revised 15 September 2026
  • Accepted 24 September 2026
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