%0 Journal Article
%T Time-resolved observation of fast domain-walls driven by vertical spin currents in short tracks
%A Joao Sampaio
%A Steven Lequeux
%A Peter J. Metaxas
%A Andre Chanthbouala
%A Rie Matsumoto
%A Kay Yakushiji
%A Hitoshi Kubota
%A Akio Fukushima
%A Shinji Yuasa
%A Kazumasa Nishimura
%A Yoshinori Nagamine
%A Hiroki Maehara
%A Koji Tsunekawa
%A Vincent Cros
%A Julie Grollier
%J Physics
%D 2013
%I arXiv
%R 10.1063/1.4848795
%X We present time-resolved measurements of the displacement of magnetic domain-walls (DWs) driven by vertical spin-polarized currents in track-shaped magnetic tunnel junctions. In these structures we observe very high DW velocities (600 m/s) at current densities below $10^7 A/cm^2$. We show that the efficient spin-transfer torque combined with a short propagation distance allows to avoid the Walker breakdown process, and achieve deterministic, reversible and fast ($\approx$ 1 ns) DW-mediated switching of magnetic tunnel junction elements, which is of great interest to the implementation of fast DW-based spintronic devices.
%U http://arxiv.org/abs/1309.1002v2