Domain wall pinning and interaction in rough cylindrical nanowires
arXiv:1506.05960 · doi:10.1063/1.4899128
Abstract
Interactions between pairs of magnetic domain walls (DW) and pinning by radial constrictions were studied in cylindrical nanowires with surface roughness. It was found that a radial constriction creates a symmetric pinning potential well, with a change of slope when the DW is situated outside the notch. Surface deformation induces an asymmetry in the pinning potential as well as dynamical pinning. The depinning fields of the domain walls were found generally to decrease with increasing surface roughness. A DW pinned at a radial constriction creates a pinning potential well for a free DW in a parallel wire. We determined that trapped bound DW states appear above the depinning threshold and that the surface roughness facilitates the trapped bound DW states in parallel wires.
References in corpus (4)
- Domain wall pinning and potential landscapes created by constrictions and protrusions in ferromagnetic nanowires
- Domain wall pinning and interaction in rough cylindrical nanowires
- The effect of disorder on transverse domain wall dynamics in magnetic nanostrips
- Spin-torque effect on spin wave modes in magnetic nanowires