Time-resolved observation of fast domain-walls driven by vertical spin currents in short tracks
Sampaio, Joao · Lequeux, Steven · Metaxas, Peter J. · Chanthbouala, Andre · Matsumoto, Rie · Yakushiji, Kay · Kubota, Hitoshi · Fukushima, Akio · Yuasa, Shinji · Nishimura, Kazumasa · Nagamine, Yoshinori · Maehara, Hiroki · Tsunekawa, Koji · Cros, Vincent · Grollier, Julie
الأصل · EN
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 10⁷ A/cm². 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 (≈ 1 ns) DW-mediated switching of magnetic tunnel junction elements, which is of great interest to the implementation of fast DW-based spintronic devices.
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