title: Domain wall manipulation with a magnetic tip.
abstract: A theoretical concept of local manipulation of magnetic domain walls is introduced. In the proposed procedure, a domain wall is driven by a spin-polarized current induced by a magnetic tip, as used in a scanning tunneling microscope, placed above a magnetic nanostripe and then moved along its long axis with a current flowing through the vacuum barrier. The angular momentum from the spin-polarized current exerts a torque on the magnetic moments underneath the tip and leads to a displacement of the domain wall. Particularly, the manipulation of a ferromagnetic 180° transverse domain wall has been studied by means of Landau-Lifshitz-Gilbert dynamics and Monte Carlo simulations. Different relative orientations of the tip and the sample magnetization have been considered.
authors.affiliation: Institute of Applied Physics and Microstructure Advanced Research Center, University of Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Stapelfeldt
authors.forename: R
authors.initials: R
authors.lastname: Wieser
authors.forename: E Y
authors.initials: EY
authors.lastname: Vedmedenko
authors.forename: R
authors.initials: R
authors.lastname: Wiesendanger