Stable magnetic nanodomains engineered via Ga+-ion irradiation for deterministic sequential switching
Abstract
Precise control of magnetic domain formation at the nanoscale remains constrained by stochastic defect-mediated and unstable pinning, limiting scalability and reproducibility in spintronic architectures. Here we demonstrate that spatially engineered anisotropy gradients provide a deterministic alternative. Using focused Ga+-ion irradiation, we pattern magnetic energy landscapes containing nanoscale "anisotropy wells" that confine magnetic domain walls and enable bidirectional sequential switching without reliance on difficult-to-control material disorder. An analytical framework describing domain-wall energetics in graded anisotropy profiles yields predictive design rules for depinning and stability, which are supported by micromagnetic simulations and experiments. We realize programmable multi-domain configurations in continuous ferromagnetic films and demonstrate robust, reproducible switching of 750 nm regions, while first results for 100 nm are shown, approaching the theoretical limit set by the domain-wall width. By replacing unstable pinning with engineered energy landscapes, this anisotropy landscape establishes a scalable materials strategy for deterministic magnetic-state programming and opens a pathway toward dense, energy-efficient spintronic and reconfigurable magnetic nanodevices.
Versions
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BibTeX
@misc{simons2026stable,
title = {{Stable magnetic nanodomains engineered via Ga+-ion irradiation for deterministic sequential switching}},
author = {Gijs W. A. Simons and Rik F. J. van Haren and Bert Koopmans},
howpublished = {arXiv},
year = {2026},
month = may,
doi = {10.48550/arxiv.2605.15883},
eprint = {2605.15883},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.15883},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Stable magnetic nanodomains engineered via Ga+-ion irradiation for deterministic sequential switching
AU - Gijs W. A. Simons
AU - Rik F. J. van Haren
AU - Bert Koopmans
PY - 2026
DA - 2026/05/15
PB - arXiv
DO - 10.48550/arxiv.2605.15883
UR - https://arxiv.org/abs/2605.15883
AB - Precise control of magnetic domain formation at the nanoscale remains constrained by stochastic defect-mediated and unstable pinning, limiting scalability and reproducibility in spintronic architectures. Here we demonstrate that spatially engineered anisotropy gradients provide a deterministic alternative. Using focused Ga+-ion irradiation, we pattern magnetic energy landscapes containing nanoscale "anisotropy wells" that confine magnetic domain walls and enable bidirectional sequential switching without reliance on difficult-to-control material disorder. An analytical framework describing domain-wall energetics in graded anisotropy profiles yields predictive design rules for depinning and stability, which are supported by micromagnetic simulations and experiments. We realize programmable multi-domain configurations in continuous ferromagnetic films and demonstrate robust, reproducible switching of 750 nm regions, while first results for 100 nm are shown, approaching the theoretical limit set by the domain-wall width. By replacing unstable pinning with engineered energy landscapes, this anisotropy landscape establishes a scalable materials strategy for deterministic magnetic-state programming and opens a pathway toward dense, energy-efficient spintronic and reconfigurable magnetic nanodevices.
ER -