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

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 effi...

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Veröffentlicht in:Applied physics letters 2013-12, Vol.103 (24)
Hauptverfasser: 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
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Sprache:eng
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Zusammenfassung: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 avoiding the Walker breakdown process and achieving deterministic, reversible, and fast (≈1 ns) DW-mediated switching of magnetic tunnel junction elements, which is of great interest for the implementation of fast DW-based spintronic devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4848795