  Domain wall propagation dynamics have been studied in nanostructured
artificial kagome spin ice structures. A stripline circuit has been used to
provide localised pulsed magnetic fields within the artificial spin ice
structure. This provides control of the system through electrically assisted
domain wall nucleation events. Synchronisation of the pulsed fields with
additional global magnetic fields and the use of a focussed magneto-optical
Kerr effect magnetometer allows our experiments to probe the domain wall
transit through an extended ASI structure. We find that the propagation
distance depends on the driving field revealing field driven properties of
domain walls below their intrinsic nucleation field.
