Simultaneous resolution of the micromagnetic and spin transport equations applied to current-induced domain wall dynamics

作者：Sturma M; Bellegarde C; Toussaint J C; Gusakova D

来源：Physical Review B, 2016, 94(10): 104405.

DOI：10.1103/PhysRevB.94.104405

In this paper, we use simulations to study current-induced domain wall dynamics by simultaneously resolving the spin transport and micromagnetic equations for a three-dimensional ferromagnetic strip. In contrast to local approaches, which neglect mutual interaction between spins and magnetic moments, our approach recalculates the spin distribution at each time step using the generalized drift diffusion model, which takes the transverse spin absorption phenomenon into account. We quantified the differences between a local approach and treatment based on a self-consistent method by plotting the domain wall velocity as a function of the domain wall width. We also characterized the domain wall velocity and the Walker breakdown condition as a function of the transverse spin absorption length l(perpendicular to), which plays a crucial role in domain wall dynamics.

• 出版日期2016-9-6
• 单位中国地震局