Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-09-28
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 4 figures
Scientific paper
We report a study on the field-driven propagation of vortex-like domain walls in ferromagnetic nanotubes. This particular geometry gives rise to a special feature of the static wall configuration, which significantly influences its dynamics. Unlike domain walls in flat strips, the left-right symmetry of domain wall propagation is broken. Furthermore, the domain wall velocity is not limited by the Walker breakdown. Under sufficiently large magnetic fields, the domain wall velocity reaches the velocity of spin waves (about 1000 m/s) and is thereafter connected with a direct emission of spin waves. The moving domain wall maintains its main structure but has characteristic spin-wave tails attached. The spatial profile of this topological soliton is determined by the spin-wave dispersion.
Andreas Christian
Garcia-Sanchez Felipe
Hertel Riccardo
Kákay Attila
Yan Ming
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