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arXiv · 1309.1002

Time-resolved observation of fast domain-walls driven by vertical spin currents in short tracks

Joao Sampaio·Steven Lequeux·Peter J. Metaxas·Andre Chanthbouala·Rie Matsumoto·Kay Yakushiji·Hitoshi Kubota·Akio Fukushima·Shinji Yuasa·Kazumasa Nishimura·Yoshinori Nagamine·Hiroki Maehara·Koji Tsunekawa·Vincent Cros·Julie Grollier
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Abstract

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.

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Joao Sampaio, Steven Lequeux, Peter J. Metaxas, Andre Chanthbouala, Rie Matsumoto, Kay Yakushiji, Hitoshi Kubota, Akio Fukushima, Shinji Yuasa, Kazumasa Nishimura, Yoshinori Nagamine, Hiroki Maehara, Koji Tsunekawa, Vincent Cros, Julie Grollier. 2013-09-04. Time-resolved observation of fast domain-walls driven by vertical spin currents in short tracks. https://doi.org/10.1063/1.4848795

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