Creating and Deleting a Single Dipolar Skyrmion by Surface Spin Twists

Abstract

We report deterministic operations on single dipolar skyrmions confined in nanostructured cuboids using in-plane currents. We achieve highly reversible writing and deleting of skyrmions in the simple cuboid without any artificial defects or pinning sites. The current-induced creation of skyrmions is well-understood through the spin-transfer torque acting on surface spin twists of the spontaneous 3D ferromagnetic state, caused by the magnetic dipole-dipole interaction of the uniaxial Fe3Sn2 magnet with a low-quality factor. Current-induced deletions of skyrmions result from the combined effects of magnetic hysteresis and Joule thermal heating. Our results are replicated consistently through 3D micromagnetic simulations. Our approach offers a viable method for achieving reliable single-bit operations in skyrmionic devices for applications such as random-access memories.

Published in Nano Letters

References in corpus (6)

• Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
• Magnetic Skyrmion Bundles and Their Current-Driven Dynamics
• Direct imaging of a zero-field target skyrmion and its polarity switch in a chiral magnetic nanodisk
• Current-Induced Helicity Reversal of a Single Skyrmionic Bubble Chain in a Nanostructured Frustrated Magnet
• Two-dimensional characterization of three-dimensional magnetic bubbles in Fe${}_3$Sn${}_2$ nanostructures
• Targeted Writing and Deleting of Magnetic Skyrmions in Two-Terminal Nanowire Devices

Cited by in corpus (4)

• Stable Neel-Twisted Skyrmion Bags in a van der Waals Magnet Fe3-xGaTe2 at Room Temperature
• Skyrmion Sliding Switch in a 90-nm-Wide Nanostructured Chiral Magnet
• Current-controlled creations, deletions, and topological transformations of a single magnetic antiskyrmion in nanostructured cells
• Fresnel Magnetic Imaging of Ultrasmall Skyrmion Lattices