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Article Dans Une Revue Physical Review Letters Année : 2012

Direct Observation of Massless Domain Wall Dynamics in Nanostripes with Perpendicular Magnetic Anisotropy

Résumé

Domain wall motion induced by nanosecond current pulses in nanostripes with perpendicular magnetic anisotropy (Pt/Co/AlO$_x$) is shown to exhibit negligible inertia. Time-resolved magnetic microscopy during current pulses reveals that the domain walls start moving, with a constant speed, as soon as the current reaches a constant amplitude, and no or little motion takes place after the end of the pulse. The very low 'mass' of these domain walls is attributed to the combination of their narrow width and high damping parameter $\alpha$. Such a small inertia should allow accurate control of domain wall motion, by tuning the duration and amplitude of the current pulses.
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Dates et versions

hal-00707524 , version 1 (12-06-2012)

Identifiants

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Jan Vogel, Marlio Bonfim, Nicolas Rougemaille, Olivier Boulle, Ioan Mihai Miron, et al.. Direct Observation of Massless Domain Wall Dynamics in Nanostripes with Perpendicular Magnetic Anisotropy. Physical Review Letters, 2012, 108, pp.247202. ⟨10.1103/PhysRevLett.108.247202⟩. ⟨hal-00707524⟩
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