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Publication - Professor Jonathan Robbins

    Walker solution for Dzyaloshinskii domain wall in ultrathin ferromagnetic films


    Slastikov, VV, Muratov, CB, Robbins, JM & Tretiakov, OA, 2019, ‘Walker solution for Dzyaloshinskii domain wall in ultrathin ferromagnetic films’. Physical Review B, vol 99.


    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.

    Full details in the University publications repository