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When magnetic skyrmions are moved via currents, they do not strictly travelalong the path of the current, instead their motion also gains a transversecomponent. This so-called skyrmion Hall effect can be detrimental in potentialskyrmion devices because it drives skyrmions towards the edge of their hostingmaterial where they face potential annihilation. Here we experimentally modifya skyrmion model system - an atomic Pd/Fe bilayer on Ir(111) - by decoratingthe film edge with ferromagnetic Co/Fe patches. Employing spin-polarizedscanning tunneling microscopy, we demonstrate that this ferromagnetic rimprevents skyrmion annihilation at the film edge and stabilizes skyrmions andtarget states in zero field. Furthermore, in an external magnetic field theCo/Fe rim can give rise to skyrmions pinned to the film edge. Spin dynamicssimulations reveal how a combination of different attractive and repulsiveskyrmion-edge interactions can induce such an edge-pinning effect forskyrmions.

Zero-field skyrmionic states and in-field edge-skyrmions induced by boundary tuning