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arXiv · 1808.03772

Walker solution for Dzyaloshinskii domain wall in ultrathin ferromagnetic films

Valeriy V. Slastikov·Cyrill B. Muratov·Jonathan M. Robbins·Oleg A. Tretiakov
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Abstract

We analyze the electric current and magnetic field driven domain wall motion in perpendicularly magnetized ultrathin ferromagnetic films in the presence of interfacial Dzyaloshinskii-Moriya interaction and both out-of-plane and in-plane uniaxial anisotropies. We obtain exact analytical Walker-type solutions in the form of one-dimensional domain walls moving with constant velocity due to both spin-transfer torques and out-of-plane magnetic field. These solutions are embedded into a larger family of propagating solutions found numerically. Within the considered model, we find the dependencies of the domain wall velocity on the material parameters and demonstrate that adding in-plane anisotropy may produce domain walls moving with velocities in excess of 500 m/s in realistic materials under moderate fields and currents.

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Valeriy V. Slastikov, Cyrill B. Muratov, Jonathan M. Robbins, Oleg A. Tretiakov. 2019-03-18. Walker solution for Dzyaloshinskii domain wall in ultrathin ferromagnetic films. https://doi.org/10.1103/physrevb.99.100403

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