Magnetic skyrmions are topological magnetic textures that hold great promise as nanoscale bits of information in memory and logic devices. Although room-temperature ferromagnetic skyrmions and their current-induced manipulation have been demonstrated, their velocity has been limited to about 100 meters per second. In addition, their dynamics are perturbed by the skyrmion Hall effect, a motion transverse to the current direction caused by the skyrmion topological charge. Here, we show that skyrmions in compensated synthetic antiferromagnets can be moved by current along the current direction at velocities of up to 900 meters per second. This can be explained by the cancellation of the net topological charge leading to a vanishing skyrmion Hall effect. Our results open an important path toward the realization of logic and memory devices based on the fast manipulation of skyrmions in tracks.
@article{arxiv.2404.13017,
title = {Fast current-induced skyrmion motion in synthetic antiferromagnets},
author = {Van Tuong Pham and Naveen Sisodia and Ilaria Di Manici and Joseba Urrestarazu-Larrañaga and Kaushik Bairagi and Johan Pelloux-Prayer and Rodrigo Guedas and Liliana Buda-Prejbeanu and Stéphane Auffret and Andrea Locatelli and Tevfik Onur Menteş and Stefania Pizzini and Pawan Kumar and Aurore Finco and Vincent Jacques and Gilles Gaudin and Olivier Boulle},
journal= {arXiv preprint arXiv:2404.13017},
year = {2024}
}
Comments
The document includes the main text and the supplementary materials. This is the accepted version of the work published in Science, 384, 6693 (2024)