Static Properties and Current-Driven Dynamics of Domain Walls in Perpendicular Magnetocrystalline Anisotropy Nanostrips with Rectangular Cross-Section

Figure 4

𝜇𝑀 results of the current driven DW dynamics along a perfect strip with 𝐿_𝑦×𝐿_𝑧=120×3nm² in the presence of SOI (𝛼_𝑅=10⁻¹¹eVm). (a), (b), and (c) depict the micromagnetically (𝜇𝑀) computed temporal evolution of the DW width Δ, the DW velocity 𝑣 and the DW position 𝑥 under three different density currents: 𝑗_𝑎=0.1A/𝜇m², 𝑗_𝑎=0.2A/𝜇m², and 𝑗_𝑎=0.5A/𝜇m² for a nonadiabatic parameter of 𝜉=0.4. (d)-(e) show typical micromagnetic states of the propagating DW in the presence of SOI. (f) Time-averaged DW velocity as function of 𝑗_𝑎 for three different values of the nonadiabatic parameter: 𝜉=0, 𝜉=0.2, and 𝜉=0.4. Filled and open symbols correspond to the cases with 𝛼_𝑅=0 and 𝛼_𝑅=10⁻¹¹eVm, respectivelly (Reprinted with permission From [72]. Copyright (2012), American Institute of Physics).