Synthetic route to low damping in ferromagnetic thin-films

Azzawi, S.; Umerski, A.; Sampaio, L. C.; Bunyaev, S. A.; Kakazei, G. N.; Atkinson, D.

Abstract

Previous theory indicated that the individual monolayers within transition metal ferromagnet thin-films contribute different magnitudes to the total ferromagnetic damping. Here, the aim was to investigate if the thin-film damping could be reduced by electronic engineering of the higher damping regions via localized doping. We present new theoretical analysis and experimental results for sputtered Co thin-films in which the upper and lower surface regions were locally doped with Cr. Theory indicates that local doping does reduce the damping and the experiments show a comparable reduction of the damping with increasing local doping up to 30% Cr, while the measured damping falls further with higher local doping, which may be attributed to changes in the film structure. This work opens a route to create low-damping magnetic thin-films.

Citation

Azzawi, S., Umerski, A., Sampaio, L. C., Bunyaev, S. A., Kakazei, G. N., & Atkinson, D. (2023). Synthetic route to low damping in ferromagnetic thin-films. APL Materials, 11(8), Article 081108. https://doi.org/10.1063/5.0147172

• Journal Article Type: Article
• Acceptance Date: Jul 13, 2023
• Online Publication Date: Aug 4, 2023
• Publication Date: Aug 1, 2023
• Deposit Date: Aug 18, 2023
• Publicly Available Date: Aug 18, 2023
• Journal: APL Materials
• Electronic ISSN: 2166-532X
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 8
• Article Number: 081108
• DOI: https://doi.org/10.1063/5.0147172
• Keywords: General Engineering; General Materials Science
• Public URL: https://durham-repository.worktribe.com/output/1721233