Geometry-induced motion of magnetic domain walls in curved nanostripes

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Date
2018
Authors
Yershov, Kostiantyn
Kravchuk, Volodymyr
Sheka, Denis
Pylypovskyi, Oleksandr
Makarov, Denys
Gaididei, Yuri
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Abstract
Dynamics of topological magnetic textures are typically induced externally by, e.g. magnetic fields or spin/charge currents. Here, we demonstrate the effect of the internal-to-the-system geometryinduced motion of a domain wall in a curved nanostripe. Being driven by the gradient of the curvature of a biaxial stripe, transversal domain walls acquire remarkably high velocities of up to 100 m/s and do not exhibit any Walker-type speed limit. We pinpoint that the inhomogeneous distribution of the curvature-induced Dzyaloshinskii–Moriya interaction is a driving force for the motion of a domain wall. Although we showcase our approach on the specific Euler spiral geometry, the approach is general and can be applied to a wide class of geometries.
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Keywords
magnetic domain walls, curved nanostripes, internal-to-the-system geometryinduced motion, domain wall, Dzyaloshinskii–Moriya interaction, Euler spiral geometry, article
Citation
Geometry-induced motion of magnetic domain walls in curved nanostripes [electronic resource] / Yershov K. V., Kravchuk V. P., Sheka D. D., Pylypovskyi O. V., Makarov D., Gaididei Y. // Physical Review B. - 2018. - Vol. 98, Issue 6. - Article number 060409. - DOI: 10.1103/PhysRevB.98.060409