Skyrmion-antiskyrmion droplets in a chiral ferromagnet

Abstract

We find numerically skyrmionic textures with skyrmion number Q=0 in ferromagnets with the Dzyaloshinskii-Moriya interaction and perpendicular anisotropy. These have the form of a skyrmion-antiskyrmion pair and may be called chiral droplets. They are stable in an infinite film as well as in disc-shaped magnetic elements. Droplets are found for values of the parameters close to the transition from the ferromagnetic to the spiral phase. We study their motion under spin-transfer torque. They move in the direction of the spin flow and, thus, their dynamics are drastically different than the Hall dynamics of the standard Q=0 skyrmion.

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Cited by in corpus (3)

• Geometry and Symmetry in Skyrmion Dynamics
• Freezing and thawing magnetic droplet solitons
• Robust and programmable logic-in-memory devices exploiting skyrmion confinement and channeling using local energy barriers