Domain Wall Motion in Magnetic Helices

Rashba Torque Driven Domain Wall Motion in Magnetic Helices.

Oleksandr V. Pylypovskyi, Denis D. Sheka, Volodymyr P. Kravchuk, Kostiantyn V. Yershov, Denys Makarov & Yuri Gaididei

Scientific Reports 6, 23316 (2016)

(a) Schematics of magnetic helix with the easy-tangential anisotropy (magnetic moments are shown with red arrows, TNB-basis is shown with green arrows. (b) The rotation angle ψ for different torsions σ and curvatures ϰ. The onion state is energetically preferable in the grey region³⁷. Solid lines correspond to analytics³⁷, filled circles and open squares correspond to SLaSi and Nmag simulations, respectively; see Methods for details. (c,d) Discrete magnetic moments at equilibrium for right- and left-handed helices, respectively. The effective anisotropy axis is shown with thin black arrow e₁.