title: High Domain Wall Velocities due to Spin Currents Perpendicular to the Plane.
abstract: We consider long and narrow spin valves composed of a first magnetic layer with a single domain wall (DW), a normal metal spacer, and a second magnetic layer that is a planar or a perpendicular polarizer. For these structures, we study numerically DW dynamics taking into account the spin torques due to the perpendicular spin currents. We obtain high DW velocities: 5 m/s for planar polarizer and 80 m/s for perpendicular polarizer for I=0.01 mA. These values are much larger than those predicted and observed for DW motion due to the in-plane spin currents. The ratio of the magnitudes of the torques, which generate the DW motion in the respective cases, is responsible for these large differences.
authors.affiliation: A. M. Prokhorov General Physics Institute of RAS, 119991 Moscow, Russia. khvalkov@fpl.gpi.ru
authors.forename: A V
authors.initials: AV
authors.lastname: Khvalkovskiy
authors.forename: K A
authors.initials: KA
authors.lastname: Zvezdin
authors.forename: Ya V
authors.initials: YV
authors.lastname: Gorbunov
authors.forename: V
authors.initials: V
authors.lastname: Cros
authors.forename: J
authors.initials: J
authors.lastname: Grollier
authors.forename: A
authors.initials: A
authors.lastname: Fert
authors.forename: A K
authors.initials: AK
authors.lastname: Zvezdin