Current-controlled creations, deletions, and topological transformations of a single magnetic antiskyrmion in nanostructured cells

TL;DR

This study demonstrates the electrical creation, deletion, and topological transformation of a single antiskyrmion in nanostructured cells at room temperature, advancing potential spintronic device applications.

Contribution

It provides the first experimental demonstration of current-controlled manipulation of individual antiskyrmions, including their creation, deletion, and topological transformations.

Findings

Reversible creation and deletion of antiskyrmions achieved

Rich topological transformations observed among magnetic states

Micromagnetic simulations confirm role of spin transfer torque and Joule heating

Abstract

Topological magnetic solitons have emerged as promising candidates for information carriers in spintronic devices, thanks to their fascinating electromagnetic properties. For fundamental device applications, the ability to electrically manipulate individual solitons is crucial. However, electrical manipulation of single antiskyrmions has been rarely demonstrated. In this work, we present current-controlled manipulations, encompassing the creation, deletion, and topological transformation of a single antiskyrmion within FeNiPdP nanostructured cells at room temperature. This nanostructure is uniquely designed with dimensions of about 400 nm in width and length, enabling the stabilization of a single antiskyrmion. By simply adjusting the density of nanosecond single-pulsed currents, we achieve the reversible creation and deletion of single antiskyrmions. Moreover, we uncover a rich variety of current-controlled topological transformations among individual antiskyrmions, skyrmions, bubbles, and ferromagnetic states. Our experimental findings are corroborated by micromagnetic simulations, highlighting the pivotal role of current-induced combined effects, such as spin transfer torque and Joule heating. Our results hold potential for advancing antiskyrmion-based device applications.