title: Measuring domain wall fidelity lengths using a chirality filter.
abstract: The motion of transverse domain walls (DWs) in thin Permalloy nanowires has been studied by locally detecting the chirality of the moving DW, using a cross-shaped trap acting as a chirality filter. We find that structural changes of the DW occur over a characteristic minimum distance: the "DW fidelity length." The measured field dependence of the fidelity length is in good qualitative agreement with a 1D analytical model and with published results of numerical simulations and experiments. We also demonstrate extension of the fidelity length to meter length scales using a series of filters.
authors.affiliation: Department of Physics, Imperial College London, Prince Consort Road, London SW7 2BW, United Kingdom.
authors.forename: E R
authors.initials: ER
authors.lastname: Lewis
authors.forename: D
authors.initials: D
authors.lastname: Petit
authors.forename: A-V
authors.initials: AV
authors.lastname: Jausovec
authors.forename: L
authors.initials: L
authors.lastname: O'Brien
authors.forename: D E
authors.initials: DE
authors.lastname: Read
authors.forename: H T
authors.initials: HT
authors.lastname: Zeng
authors.forename: R P
authors.initials: RP
authors.lastname: Cowburn