Abstract

The small Dzyaloshinskii-Moriya interaction in chiral magnets can lead to long-range modulations of the magnetization which can stabilize skyrmion lattices or a helical phase. While skyrmion lattices are well- known to be highly mobile and manipulable by electric currents, the helical phase is often strongly pinned. In thin films of chiral mag- nets, however, the current density can be large enough to depin the helix. We study the dynamics of the helical phase under spin transfer torques by combining analytics and numerical simulations of the mi- cromagnetic model, and reveal how a reorientation of the helical phase can be achieved and exploited for memory devices.