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Vogel J, Bonfim M, Rougemaille N, et al. Direct observation of massless domain wall dynamics in nanostripes with perpendicular magnetic anisotropy. Phys Rev Lett. 2012;108(24):247202doi: 10.1103/PhysRevLett.108.247202.
Vogel, J., Bonfim, M., Rougemaille, N., Boulle, O., Miron, I. M., Auffret, S., Rodmacq, B., Gaudin, G., Cezar, J. C., Sirotti, F., & Pizzini, S. (2012). Direct observation of massless domain wall dynamics in nanostripes with perpendicular magnetic anisotropy. Physical review letters, 108(24), 247202. https://doi.org/10.1103/PhysRevLett.108.247202
Vogel, J, et al. "Direct observation of massless domain wall dynamics in nanostripes with perpendicular magnetic anisotropy." Physical review letters vol. 108,24 (2012): 247202. doi: https://doi.org/10.1103/PhysRevLett.108.247202
Vogel J, Bonfim M, Rougemaille N, Boulle O, Miron IM, Auffret S, Rodmacq B, Gaudin G, Cezar JC, Sirotti F, Pizzini S. Direct observation of massless domain wall dynamics in nanostripes with perpendicular magnetic anisotropy. Phys Rev Lett. 2012 Jun 15;108(24):247202. doi: 10.1103/PhysRevLett.108.247202. Epub 2012 Jun 11. PMID: 23004314.
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Phys Rev Lett. 2012 Jun 15;108(24):247202. doi: 10.1103/PhysRevLett.108.247202. Epub 2012 Jun 11.

Direct observation of massless domain wall dynamics in nanostripes with perpendicular magnetic anisotropy.

Physical review letters

J Vogel, M Bonfim, N Rougemaille, O Boulle, I M Miron, S Auffret, B Rodmacq, G Gaudin, J C Cezar, F Sirotti, S Pizzini

Affiliations

  1. Institut Néel, CNRS and UJF, BP166, 38042 Grenoble, France. [email protected]

PMID: 23004314 DOI: 10.1103/PhysRevLett.108.247202

Abstract

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 α. 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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