Spin-Orbit-Torque-Driven Recurrent Motion of Synthetic Antiferromagnetic Skyrmions for Magnetic Clocking
Abstract
Magnetic skyrmions in synthetic antiferromagnets have emerged as attractive information carriers for spintronic technologies due to their compensated topology, which mitigates the skyrmion Hall effect and facilitates reliable current-driven transport. Here we present a frequency-tunable magnetic clocking concept based on the recurring translational motion of SAF skyrmions and define the material conditions needed to realize it in a Pt/Co/Ru/Pt/Co multilayer. Using micromagnetic simulations, we investigate the combined effects of interfacial Dzyaloshinskii-Moriya interaction and interlayer Ruderman-Kittel-Kasuya-Yosida exchange coupling, delineating the parameter space in which coupled Néel-type skyrmions with opposite topological charges form a stable, topologically compensated pair. Under spin-orbit torque excitation, the SAF skyrmions exhibit resilient longitudinal transport with minimal transverse deflection using periodic boundary conditions. Periodic boundary conditions serve as an idealized model for closed-loop racetrack geometries, facilitating the study of continuous transport cycles and long-range steady-state dynamics. The oscillation frequency is readily modified by the applied current density and material characteristics, offering a pathway to field-free nanoscale timing components. Moreover, the threshold-activated initiation of recurrent transport mimics tonic-spiking behavior, indicating possible use in neuromorphic signal generation. This work establishes SAF skyrmions as versatile building elements for future spintronic functional devices by integrating topological protection, controllable transport, and cyclic dynamics.
Related
- Bidirectional motion of antiferromagnetic skyrmions driven by competing spin torques
- Nonlinear Topological Orbital Responses of Antiferromagnetic Skyrmions
- Derivation of the Thiele equation for magnetic skyrmions using the Mori-Zwanzig formalism
- Uniqueness and radial symmetry of magnetic skyrmions
- Self-induced spin-orbit torque switching in a synthetic antiferromagnetic Co 2 MnGa /MnGa bilayer
BibTeX
@misc{mathur2026spinorbittorquedriven,
title = {{Spin-Orbit-Torque-Driven Recurrent Motion of Synthetic Antiferromagnetic Skyrmions for Magnetic Clocking}},
author = {Sayan Mathur and Payal Bhattacharjee and Saswati Barman and Anjan Barman},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.37014},
eprint = {2610.37014},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.37014},
}
RIS
TY - UNPB
TI - Spin-Orbit-Torque-Driven Recurrent Motion of Synthetic Antiferromagnetic Skyrmions for Magnetic Clocking
AU - Sayan Mathur
AU - Payal Bhattacharjee
AU - Saswati Barman
AU - Anjan Barman
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.37014
UR - https://arxiv.org/abs/2610.37014
AB - Magnetic skyrmions in synthetic antiferromagnets have emerged as attractive information carriers for spintronic technologies due to their compensated topology, which mitigates the skyrmion Hall effect and facilitates reliable current-driven transport. Here we present a frequency-tunable magnetic clocking concept based on the recurring translational motion of SAF skyrmions and define the material conditions needed to realize it in a Pt/Co/Ru/Pt/Co multilayer. Using micromagnetic simulations, we investigate the combined effects of interfacial Dzyaloshinskii-Moriya interaction and interlayer Ruderman-Kittel-Kasuya-Yosida exchange coupling, delineating the parameter space in which coupled Néel-type skyrmions with opposite topological charges form a stable, topologically compensated pair. Under spin-orbit torque excitation, the SAF skyrmions exhibit resilient longitudinal transport with minimal transverse deflection using periodic boundary conditions. Periodic boundary conditions serve as an idealized model for closed-loop racetrack geometries, facilitating the study of continuous transport cycles and long-range steady-state dynamics. The oscillation frequency is readily modified by the applied current density and material characteristics, offering a pathway to field-free nanoscale timing components. Moreover, the threshold-activated initiation of recurrent transport mimics tonic-spiking behavior, indicating possible use in neuromorphic signal generation. This work establishes SAF skyrmions as versatile building elements for future spintronic functional devices by integrating topological protection, controllable transport, and cyclic dynamics.
ER -