Physics

Symmetry (geometry)

Magnetization

Mathematics

Lorentz transformation

Skyrmion

Magnetic field

Magnet

Geometry

Condensed matter physics

Demagnetizing field

Quantum mechanics

Classical mechanics

Physical Review Letters

We report the direct evidence of field-dependent character of the interaction between individual magnetic skyrmions as well as between skyrmions and edges in B20-type FeGe nanostripes observed by means of high resolution Lorentz transmission electron microscopy. It is shown that above certain critical values of external magnetic field the character of such long-range skyrmion interactions change from attraction to repulsion. Experimentally measured equilibrium inter-skyrmion and skrymion-edge distances as function of applied magnetic field shows quantitative agreement with the results of micromagnetic simulations. Important role of demagnetizing fields and internal symmetry of three-dimensional magnetic skyrmions are discussed in details.

Interaction of Individual Skyrmions in a Nanostructured Cubic Chiral Magnet