Isolated skyrmion, skyrmion lattice and antiskyrmion lattice creation through magnetization reversal in Co/Pd nanostructure

Sateesh Kandukuri,V Satya Narayana Murthy,P K Thiruvikraman

doi:10.1038/s41598-021-98337-6

Sateesh Kandukuri, V Satya Narayana Murthy + Show 1 more

Open Access

https://doi.org/10.1038/s41598-021-98337-6

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Abstract

Skyrmion and antiskyrmion spin textures are axisymmetric inhomogeneous localized objects with distinct chirality in magnetic systems. These spin textures are potential candidates for the next generation energy-efficient spintronic applications due to their unique topological properties. Controlled and effective creation of the spin textures is required to use in conventional and neuromorphic computing applications. Here we show by micromagnetic simulations creating an isolated skyrmion, skyrmion lattice and antiskyrmion lattice through the magnetization reversal in Co/Pd multilayer nanostructure using spin-polarized current. The spin textures' stability depends on the spin-polarized current density, current pulse width, and Dzyaloshinskii–Moriya interaction (DMI). Antiskyrmions are evolved during the formation of a single skyrmion and skyrmion lattice. Skyrmion and antiskyrmion lattices together are observed for lower pulse width, 0.05 ns. Our micromagnetic studies suggest that the two distinct lattice phases' evolution could help to design the topological spin textures-based devices.

Highlights

Skyrmion and antiskyrmion spin textures are axisymmetric inhomogeneous localized objects with distinct chirality in magnetic systems
The spacer layer, Pd, introduces the interfacial Dzyaloshinskii–Moriya interaction (DMI) required for the formation of magnetic skyrmions
Lower current densities required longer pulse width to form a skyrmion, and it is stabilized through breathing mode

Summary

Introduction

Skyrmion and antiskyrmion spin textures are axisymmetric inhomogeneous localized objects with distinct chirality in magnetic systems. The evolution of antiskyrmion lattice is observed by merging adjacent incomplete skyrmions for lower current densities and longer pulse widths. It has been observed the formation of the skyrmion and antiskyrmion lattice together for higher current densities and lower current pulse widths through dumbbell spin textures (Q = 0).

Results

Conclusion