Walker solution for Dzyaloshinskii domain wall in ultrathin ferromagnetic films

Article

关键词: SPIN-ORBIT TORQUES;    MOTION;    DYNAMICS;   

DOI  :  10.1103/PhysRevB.99.100403

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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