Near-field interaction between domain walls in adjacent Permalloy nanowires

Abstract

The magnetostatic interaction between two oppositely charged transverse domain walls (DWs)in adjacent Permalloy nanowires is experimentally demonstrated. The dependence of the pinning strength on wire separation is investigated for distances between 13 and 125 nm, and depinning fields up to 93 Oe are measured. The results can be described fully by considering the interaction between the full complex distribution of magnetic charge within rigid, isolated DWs. This suggests the DW internal structure is not appreciably disturbed by the pinning potential, and that they remain rigid although the pinning strength is significant. This work demonstrates the possibility of non-contact DW trapping without DW perturbation and full continuous flexibility of the pinning potential type and strength. The consequence of the interaction on DW based data storage schemes is evaluated.

arXiv comment4 pages, 4 figures, 1 page supplimentary material (supporting.ps)

References in corpus (3)

• Understanding of complex periodic transformations of moving domain walls in magnetic nanostripes
• Domain wall pinning and potential landscapes created by constrictions and protrusions in ferromagnetic nanowires
• Propagation of a magnetic domain wall in magnetic wires with asymmetric notches

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• Controlled domain wall pinning in ferromagnetic nanowire by nanoparticles stray fields
• Dragging of magnetic domain walls by interlayer exchange