Suppression of Stochastic Domain Wall Pinning Through Modified Gilbert Damping

This project investigates the stochastic behaviour of domain walls interacting at pinning sites within soft-ferromagnetic nanowires.

Domain walls driven by externally-applied magnetic fields can undergo changes in their configuration. This changing structure can give rise to different responses at a pinning site, more possible structures gives more possible outputs. However, in technologies which require known outputs, such as domain wall logic, these multiple pinned states are detrimental.

To overcome this problem, it has been proposed that by doping soft-ferromagnetic nanowires with small amounts of Rare Earth elements can suppress the changing structure of a domain wall during propagation and therefore give singular responses at a pinning site.