title: Dynamic propagation and nucleation in domain wall nanowire devices.
abstract: The dynamic injection and propagation of domain walls (DWs) in technologically relevant geometries have been investigated. On short (~10 ns) timescales nucleation of a DW by a localized Oersted field is found to be well described using a Néel-Brown reversal mode. Using locally injected DWs, we test the propagation of DWs over long distances (~100 µm) in close proximity nanowires and beyond the Walker breakdown limit. In nanowires that act as true conduits to a DW, data can be successfully propagated without loss or inter-wire cross-talk. This is in contrast to poorly characterized systems where the DW is found to propagate asynchronously above the critical breakdown field.
authors.affiliation: Thin Film Magnetism, Cavendish Laboratory, University of Cambridge, Cambridge, UK. lao24@cam.ac.uk
authors.forename: L
authors.initials: L
authors.lastname: O'Brien
authors.forename: D E
authors.initials: DE
authors.lastname: Read
authors.forename: D
authors.initials: D
authors.lastname: Petit
authors.forename: R P
authors.initials: RP
authors.lastname: Cowburn