Micromagnetic Modeling of Dzyaloshinskii-Moriya Interaction in Spin Hall Effect Switching

作者：Perez Noel^*; Torres Luis; Martinez Vecino Eduardo

来源：IEEE Transactions on Magnetics, 2014, 50(11): 1301004.

DOI：10.1109/TMAG.2014.2323707

• Dzyaloshinskii-Moriya interaction (DMI)
• magnetic switching
• skyrmions
• spin Hall effect (SHE)
• stochastic processes

Recent developments in the field of spin orbitronics have demonstrated the feasibility of manipulating the magnetization in a ferromagnet by using electrical currents. Specifically, an in-plane current injected into a heavy-metal/ferromagnet bilayer with perpendicular anisotropy is able to induce reversal of the magnetization. Here we perform micromagnetic simulations to numerically study the dynamics of the magnetization in spin Hall effect-driven switching under the influence of an antisymmetric exchange interaction, namely the Dzyaloshinskii-Moriya interaction. We investigate the time evolution of the magnetization during the switching under different circumstances, and study the configuration of the transient magnetic structures which are formed: bubbles, half-skyrmions, and full skyrmions.

• 出版日期2014-11