A reversible conversion between a skyrmion and a domain-wall pair in junction geometry

Abstract

A skyrmion is a topological texture in the continuum field theory. Recent experimental observation of skyrmions in chiral magnet evokes a flourish of its extensive study. Skyrmion is expected to be a key component of the next generation spintronics device called skyrmionics. On the other hand, there is a well established memory device encoded by a sequence of domain walls. A skyrmion carries a topological number, whereas a domain wall does not. Nevertheless, we show a conversion is possible between a skyrmion and a domain-wall pair by connecting wide and narrow nanowires, enabling the information transmission between skyrmion device and domain-wall device. Our results will be the basis of a hybrid device made of skyrmions and domain walls, where the encoded information in domain walls is converted into skyrmions, and then read out by converting the skyrmions back to domain walls after a functional control of the skyrmions.

8 pages, 5 figures

References in corpus (7)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Skyrmion-skyrmion and skyrmion-edge repulsions in skyrmion-based racetrack memory
• Skyrmion Lattice in Two-Dimensional Chiral Magnet
• Compact Skyrmions, Merons and Bimerons in Thin Chiral Magnetic Films
• Theory for a dissipative droplet soliton excited by a spin torque nanocontact
• Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films

Cited by in corpus (24)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
• Skyrmions in Magnetic Multilayers
• Skyrmion-skyrmion and skyrmion-edge repulsions in skyrmion-based racetrack memory
• Memory functions of magnetic skyrmions
• Quantized Transport for a Skyrmion Moving on a Two-Dimensional Periodic Substrate
• Microwave-induced dynamic switching of magnetic skyrmion cores in nanodots
• Parametric Auto-Excitation of Magnetic Droplet Soliton Perimeter Modes
• Suppression of the skyrmion Hall effect in planar nanomagnets by the magnetic properties engineering: Skyrmion transport on nanotracks with magnetic strips
• Stability and dynamics of in-plane skyrmions in collinear ferromagnets
• Orientation dependent current-induced motion of skyrmions with various topologies
• Phase transition in frustrated thin films -- physics at phase boundaries
• Skyrmion collapse
• Magnetoelectric antiferromagnets as platforms for the manipulation of solitons
• Particle-continuum-medium duality of skyrmions
• Friedel oscillations induced by magnetic skyrmions: from scattering properties to all-electrical detection
• Dynamics of interacting skyrmions in magnetic nano-track
• Complex magnetism of the two-dimensional antiferromagnetic Ge2F: from a Néel spin-texture to a potential antiferromagnetic skyrmion
• Propagating magnetic droplet solitons as moveable nanoscale spin-wave sources with tunable direction of emission
• Manipulation of magnetic Skyrmions with a Scanning Tunneling Microscope
• Tuning the antiferromagnetic helical pitch length and nanoscale domain size in Fe${}_3$PO${}_4$O${}_3$ by magnetic dilution
• Tailoring the topological details of the magnetic skyrmion by the spin configuration at the edges
• Skyrmion nucleation via localized spin current injection in confined nanowire geometry in low chirality magnetic materials
• Current Induced Dynamics of Multiple Skyrmions with Domain Wall Pair and Skyrmion-based Majority Gate Design