Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films

Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films

26 Nov 2012 | André Thiaville and Stanislas Rohart, Émilie Jué, Vincent Cros and Albert Fert
The paper explores a novel domain wall structure in ultrathin magnetic films with perpendicular anisotropy, influenced by the Dzyaloshinskii-Moriya (DMI) interaction due to adjacent layers. The study uses numerical and analytical micromagnetics to investigate these walls, which can behave like highly stable Néel walls, moving at large velocities under strong fields. The authors propose these walls, termed Dzyaloshinskii domain walls (DDWs), for their relevance to current-driven domain wall motion under the spin Hall effect. They demonstrate that the DMI significantly extends the stationary regime of DW motion, increasing the Walker field and velocity. The paper also discusses the dynamics of DDWs under in-plane fields and their potential applications in current-induced DW motion, particularly in asymmetric structures where the DMI does not compensate, allowing for efficient motion of NWs under current by the spin Hall effect.The paper explores a novel domain wall structure in ultrathin magnetic films with perpendicular anisotropy, influenced by the Dzyaloshinskii-Moriya (DMI) interaction due to adjacent layers. The study uses numerical and analytical micromagnetics to investigate these walls, which can behave like highly stable Néel walls, moving at large velocities under strong fields. The authors propose these walls, termed Dzyaloshinskii domain walls (DDWs), for their relevance to current-driven domain wall motion under the spin Hall effect. They demonstrate that the DMI significantly extends the stationary regime of DW motion, increasing the Walker field and velocity. The paper also discusses the dynamics of DDWs under in-plane fields and their potential applications in current-induced DW motion, particularly in asymmetric structures where the DMI does not compensate, allowing for efficient motion of NWs under current by the spin Hall effect.
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