Multiplet of Skyrmion States on a Curvilinear Defect: Reconfigurable Skyrmion Lattices

Physical Review Letters
Volodymyr P KravchukYuri Gaididei

Abstract

Typically, the chiral magnetic Skyrmion is a single-state excitation. Here we propose a system, where multiplet of Skyrmion states appears and one of these states can be the ground one. We show that the presence of a localized curvilinear defect drastically changes the magnetic properties of a thin perpendicularly magnetized ferromagnetic film. For a large enough defect amplitude a discrete set of equilibrium magnetization states appears forming a ladder of energy levels. Each equilibrium state has either a zero or a unit topological charge; i.e., topologically trivial and Skyrmion multiplets generally appear. Transitions between the levels with the same topological charge are allowed and can be utilized to encode and switch a bit of information. There is a wide range of geometrical and material parameters, where the Skyrmion level has the lowest energy. Thus, periodically arranged curvilinear defects can result in a Skyrmion lattice as the ground state.

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Citations

Dec 7, 2019·Nanotechnology·Daniela MancillaSebastian Allende
Aug 30, 2020·Materials·Amalio Fernández-PachecoOleksandr V Dobrovolskiy
Sep 7, 2019·Physical Review Letters·Oleksii M VolkovDenys Makarov
Dec 12, 2020·Scientific Reports·Yan LiuShengjie Xuan
Oct 28, 2021·Advanced Materials·Denys MakarovOleksandr V Dobrovolskiy

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