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Fast domain wall motion governed by topology and OErsted fields in cylindrical magnetic nanowires

Abstract : While the usual approach to tailor the behavior of condensed matter and nanosized systems is the choice of material or finite-size or interfacial effects, topology alone may be the key. In the context of the motion of magnetic domain walls (DWs), known to suffer from dynamic instabilities with low mobilities, we report unprecedented velocities >600 m/s for DWs driven by spin-transfer torques in cylindrical nanowires made of a standard ferromagnetic material. The reason is the robust stabilization of a DW type with a specific topology by the Œrsted field associated with the current. This opens the route to the realization of predicted new physics, such as the strong coupling of DWs with spin waves above >600 m/s.
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Contributor : Olivier Fruchart <>
Submitted on : Friday, December 20, 2019 - 2:31:34 PM
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M. Schöbitz, A. de Riz, S. Martin, S. Bochmann, C. Thirion, et al.. Fast domain wall motion governed by topology and OErsted fields in cylindrical magnetic nanowires. Physical Review Letters, American Physical Society, 2019, 123 (21), pp.217201. ⟨10.1103/PhysRevLett.123.217201⟩. ⟨hal-02075418⟩

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