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: 50 m/s for planar polarizer and 640 m/s for perpendicular polarizer for J = 5*10^6 A/cm^2. 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.
@article{arxiv.0806.2369,
title = {High domain wall velocities due to spin currents perpendicular to the plane},
author = {A. V. Khvalkovskiy and K. A. Zvezdin and Ya. V. Gorbunov and V. Cros and J. Grollier and A. K. Zvezdin},
journal= {arXiv preprint arXiv:0806.2369},
year = {2009}
}