title: Spin waves and domain wall modes in curved magnetic nanowires.
abstract: The confinement of spin waves in inhomogeneous fields and spin wave interaction with domain walls has attracted interest due to possible applications in magnonics. We investigate spin waves in curved ferromagnetic nanowires. The field dispersion and localization of spin waves is revealed by comparison to known modes in stripes and taking into account the specific field reversal of the curved wire. In small wires we find a strongly altered mode spectrum in a certain field regime. Micromagnetic simulations show an extended domain wall within the wire in this field region. The domain wall shows several dynamic modes and changes the remaining spin wave modes. We find mode suppression as well as newly arising modes due to the strong inhomogenous internal field of the wall.
authors.affiliation: Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany. Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany. The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Bocklage
authors.forename: Sandra
authors.initials: S
authors.lastname: Motl-Ziegler
authors.forename: Jesco
authors.initials: J
authors.lastname: Topp
authors.forename: Toru
authors.initials: T
authors.lastname: Matsuyama
authors.forename: Guido
authors.initials: G
authors.lastname: Meier