Creating arbitrary sequences of mobile magnetic skyrmions and antiskyrmions

Abstract

Magnetic skyrmions and their anti-particles, the antiskyrmions, are stable magnetic solitons existing down to the nanometer scale. Their stability and size as well as the possibility to propel them by, e.g., electric currents make them promising candidates for the use in memory devices, such as racetrack memories. Skyrmions and antiskyrmions share those same advantages individually, but may annihilate each other when they coexist in the same device. Yet, combining them to represent logical bits of 0 (skyrmion) and 1 (antiskyrmion) in one device opens new possibilities to create new types of densely packed racetrack memory devices. For this, a controlled creation and annihilation procedure, i.e., a writing or deletion operation, is necessary. Here, we propose a method to create arbitrary sequences of coexisting skyrmions and antiskyrmions by rotations of the magnetic moments at the edge of a rectangular slab. The skyrmions and antiskyrmions remain stable and do not annihilate each other.

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Cited by in corpus (7)

• Optical-controlled ultrafast dynamics of skyrmion in antiferromagnets
• Field-driven skyrmion motion through velocity equipartition between skyrmions and a domain wall
• The quantum skyrmion Hall effect in f electron systems
• Spin Wave Driven Skyrmions in a Bipartite Antiferromagnetic Lattice
• Current-controlled creations, deletions, and topological transformations of a single magnetic antiskyrmion in nanostructured cells
• Design of 2D Skyrmionic Metamaterial Through Controlled Assembly
• Creation and motion of antiferromagnetic skyrmions by edge manipulation