Writing Skyrmions with a Magnetic Dipole
arXiv:1806.06393 · doi:10.1063/1.5044273
Abstract
We demonstrate numerically on large spin lattices that one can write skyrmions in a thin magnetic film with a magnetic dipole of a few tens of nanometer in size. Nucleation of non-chiral skyrmions as well as chiral skyrmions formed by the Dzyaloshinskii-Moriya interaction has been investigated. Analytical model is developed that agrees with numerical results. It is shown that skyrmions can be written though a number of scenarios that depend on the experimental technique and parameters of the system. In one scenario, that branches into subscenarios of different topology, the magnetic dipole on approaching the film creates a skyrmion-antiskyrmion pair. As the dipole moves closer to the film it induces collapse of the antiskyrmion and creation of a non-zero topological charge due to the remaining skyrmion. In a different scenario the dipole moving parallel to the film nucleates a skyrmion at the boundary and then drags it inside the film. Possible implementations of these methods for writing topologically protected information in a magnetic film are discussed.
arXiv comment9 pages, 9 figures
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Cited by in corpus (14)
- Skyrmion-electronics: Writing, deleting, reading and processing magnetic skyrmions toward spintronic applications
- Skyrmion-Skyrmion Interaction in a Magnetic Film
- Universality of annihilation barriers of large magnetic skyrmions in chiral and frustrated magnets
- Stability of Biskyrmions in Centrosymmetric Magnetic Films
- Thermal Creation of Skyrmions in Ferromagnetic Films with Perpendicular Anisotropy and Dzyaloshinskii-Moriya Interaction
- Three-Dimensional Structure of Hybrid Magnetic Skyrmions Determined by Neutron Scattering
- Boundary twists, instabilities, and creation of skyrmions and antiskyrmions
- Thermal Collapse of a Skyrmion
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- Demagnetization in micromagnetics: magnetostatic self-interactions of bulk chiral magnetic skyrmions