title: Dynamic binding of driven interfaces in coupled ultrathin ferromagnetic layers.
abstract: We demonstrate experimentally dynamic interface binding in a system consisting of two coupled ferromagnetic layers. While domain walls in each layer have different velocity-field responses, for two broad ranges of the driving field H, walls in the two layers are bound and move at a common velocity. The bound states have their own velocity-field response and arise when the isolated wall velocities in each layer are close, a condition which always occurs as H→0. Several features of the bound states are reproduced using a one-dimensional model, illustrating their general nature.
authors.affiliation: School of Physics, M013, University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia. metaxas@physics.uwa.edu.au
authors.forename: P J
authors.initials: PJ
authors.lastname: Metaxas
authors.forename: R L
authors.initials: RL
authors.lastname: Stamps
authors.forename: J-P
authors.initials: JP
authors.lastname: Jamet
authors.forename: J
authors.initials: J
authors.lastname: Ferré
authors.forename: V
authors.initials: V
authors.lastname: Baltz
authors.forename: B
authors.initials: B
authors.lastname: Rodmacq
authors.forename: P
authors.initials: P
authors.lastname: Politi