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】
Free