Enhancing domain wall velocity through interface intermixing in W-CoFeB-MgO films with perpendicular anisotropy
Zhao X, Zhang B, Vernier N, Zhang X, Sall M, Xing T, Diez LH, Hepburn C, Wang L, Durin G, Casiraghi A, Belmeguenai M, Roussigne Y, Stashkevich A, Cherif SM, Langer J, Ocker B, Jaiswal S, Jakob G, Klaeui M, Zhao W, Ravelosona D (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 115
Article Number: 122404
Journal Issue: 12
DOI: 10.1063/1.5121357
Abstract
We study the influence of He+ irradiation induced interface intermixing on magnetic domain wall (DW) dynamics in W-CoFeB (0.6 nm)-MgO ultrathin films, which exhibit high perpendicular magnetic anisotropy and large Dzyaloshinskii-Moriya interaction (DMI) values. Whereas the pristine films exhibit strong DW pinning, we observe a large increase in the DW velocity in the creep regime upon He+ irradiation, which is attributed to the reduction of pinning centers induced by interface intermixing. Asymmetric in-plane field-driven domain expansion experiments show that the DMI value is slightly reduced upon irradiation, and a direct relationship between DMI and interface anisotropy is demonstrated. Our findings provide insights into the material design and interface control for DW dynamics, as well as for DMI, enabling the development of high-performance spintronic devices based on ultrathin magnetic layers.
Involved external institutions
Beihang University, Beijing University of Aeronautics and Astronautics (BUAA) / 北京航空航天大学
China (CN)
École Polytechnique - Université Paris-Saclay
France (FR)
Italian National Institute of Metrology Research / Istituto Nazionale di Ricerca Metrologica (INRiM)
Italy (IT)
University of Paris 13 - Paris-Nord / Université Paris XIII Paris-Nord
France (FR)
Singulus Technologies AG
Germany (DE)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
China (CN)
École Polytechnique - Université Paris-Saclay
France (FR)
Italian National Institute of Metrology Research / Istituto Nazionale di Ricerca Metrologica (INRiM)
Italy (IT)
University of Paris 13 - Paris-Nord / Université Paris XIII Paris-Nord
France (FR)
Singulus Technologies AG
Germany (DE)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
How to cite
APA:
Zhao, X., Zhang, B., Vernier, N., Zhang, X., Sall, M., Xing, T.,... Ravelosona, D. (2019). Enhancing domain wall velocity through interface intermixing in W-CoFeB-MgO films with perpendicular anisotropy. Applied Physics Letters, 115(12). https://doi.org/10.1063/1.5121357
MLA:
Zhao, Xiaoxuan, et al. "Enhancing domain wall velocity through interface intermixing in W-CoFeB-MgO films with perpendicular anisotropy." Applied Physics Letters 115.12 (2019).
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