Abstract
We study current-driven skyrmion motion in uniaxial thin film antiferromagnets in the presence of the Dzyaloshinskii–Moriya interactions and in an external magnetic field. We phenomenologically include relaxation and current-induced torques due to both spin–orbit coupling and spatially inhomogeneous magnetic textures in the equation for the Néel vector of the antiferromagnet. Using the collective coordinate approach we apply the theory to a two-dimensional antiferromagnetic skyrmion and estimate the skyrmion velocity under an applied DC electric current.
Highlights
For decades ferromagnets have been the main components of spintronic devices [1]
We (i) take into account the effect of the DM interactions corresponding to a particular symmetry class of magnetic materials, (ii) incorporate phenomenologically the spin–orbit torques of an antiferromagnetic system and (iii) study the role of the external magnetic field and its effect on the skyrmion motion
We extended the phenomenological theory of a uniaxial antiferromagnet with DM interactions to incorporate the current-induced spin–orbit torques together with the already studied spin-transfer torques
Summary
Commons Attribution 3.0 licence. Keywords: antiferromagnetic skyrmions, phenomenology, spin–orbit torques, electric currents, magnetization dynamics, Any further distribution of Dzyaloshinskii–Moriya interactions this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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