Research Article
Micromagnetic Study on the Influence of Nanowire Width and Dzyaloshinskii–Moriya Interaction on Domain Wall Propagation in CoFeB Nanowires under Nanosecond Current Pulses
@INPROCEEDINGS{10.4108/eai.6-11-2025.2364328, author={Della Nurbaiti and Maria Metantomwate and Aysa Sabrina and Melenia Tambunan and Mahfuddin Zuhri and Ramlan Ramlan and Candra Kurniawan}, title={Micromagnetic Study on the Influence of Nanowire Width and Dzyaloshinskii--Moriya Interaction on Domain Wall Propagation in CoFeB Nanowires under Nanosecond Current Pulses }, proceedings={Proceedings of the 4th Sriwijaya International Conference on Basic and Applied Sciences, SICBAS 2025, 6 November 2025, Palembang, Indonesia}, publisher={EAI}, proceedings_a={SICBAS}, year={2026}, month={8}, keywords={Racetrack memory domain wall propagation CoFeB nanowire Dzyaloshinskii--Moriya Interaction (DMI) micromagnetic simulation spintronics}, doi={10.4108/eai.6-11-2025.2364328} }- Della Nurbaiti
Maria Metantomwate
Aysa Sabrina
Melenia Tambunan
Mahfuddin Zuhri
Ramlan Ramlan
Candra Kurniawan
Year: 2026
Micromagnetic Study on the Influence of Nanowire Width and Dzyaloshinskii–Moriya Interaction on Domain Wall Propagation in CoFeB Nanowires under Nanosecond Current Pulses
SICBAS
EAI
DOI: 10.4108/eai.6-11-2025.2364328
Abstract
The rapid growth of data storage demand drives the development of advanced spintronic devices beyond the limits of conventional hard disk drives and solid-state drives. Racetrack Memory is a promising technology due to its potential for ultrahigh density, non-volatility, and low energy consumption. This study investigates micromagnetic domain wall propagation in CoFeB nanowires driven by nanosecond current pulses, emphasizing the role of Dzyaloshinskii–Moriya Interaction (DMI). Simulations were performed using the Object Oriented Micromagnetic Framework with a spin-transfer torque model and an extended DMI module. Nanowire width, material parameters, and current pulse profiles were systematically varied to evaluate their effects on domain wall dynamics. Results show that reducing nanowire width increases domain wall velocity up to an optimum, beyond which instability occurs. DMI improves stability by suppressing distortions and enabling steady motion at high current densities. Nanosecond pulses allow controlled domain wall displacement without thermal degradation.
