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

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 $10^{7}A/c{m}^2$. 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.

References in corpus (2)

• Understanding of complex periodic transformations of moving domain walls in magnetic nanostripes
• High domain wall velocities due to spin currents perpendicular to the plane

Cited by in corpus (8)

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• Ultra-high differential mobility and velocity of Néel walls in spin valves with planar-transverse polarizers under low perpendicularly injected currents
• Stabilizing current-driven steady flows of 180${}^{\circ }$ domain walls in spin valves by interfacial Dzyaloshinskii-Moriya interaction
• Domain wall propagation by spin-orbit torques in in-plane magnetized systems
• Inside the perpendicular spin-torque memristor
• Slonczewski-spin-current driven dynamics of 180${}^{\circ }$ domain walls in spin valves with interfacial Dzyaloshinskii-Moriya interaction