Figure 2: Transverse domain walls in a helix.
From: Rashba Torque Driven Domain Wall Motion in Magnetic Helices
(a) Schematics of a domain wall in the helix (σ > 0), untwisted view. Magnetic moments (red arrows) lie on the helix wire (blue cylinder), directed along et . Magnetic moments inside domains are parallel to e1. (b) Phase slope ϒ (σ) for ϰ = 0.1 [symbols correspond to simulations and solid line is accordingly to Eq. (5)]. Symbols represent the results of the SLaSi simulations: for anisotropic wire without magnetostatics (model, green circle), magnetically soft wire (blue triangle) and magnetically hard wire (open triangle). Diamonds correspond to the micromagnetic simulations of a magnetically soft sample performed using Nmag, see Methods for details. (c,d) Magnetization angles in the ψ-frame [black arrows in panel (a)] for the head-to-head and tail-to-tail domain walls, respectively; ϰ = 0.1, σ = 0.5. Symbols correspond to simulations (each tenth chain site is plotted), and solid lines to Ansatz (3). Thin grey lines show levels 0, π and centre of the domain wall.
