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From Binary to Ternary Transition-Metal Nitrides: A Boost toward Nitrogen Magneto-Ionics

Tan, Zhengwei; Martins, Sofia; Escobar, Michael; de Rojas, Julius; Ibrahim, Fatima; Chshiev, Mairbek; Quintana, Alberto; Lopeandia, Aitor; Costa-Krämer, José L.; Menéndez, Enric; Sort, Jordi

From Binary to Ternary Transition-Metal Nitrides: A Boost toward Nitrogen Magneto-Ionics Thumbnail


Zhengwei Tan

Sofia Martins

Michael Escobar

Fatima Ibrahim

Mairbek Chshiev

Alberto Quintana

Aitor Lopeandia

José L. Costa-Krämer

Enric Menéndez

Jordi Sort


Magneto-ionics is an emerging actuation mechanism to control the magnetic properties of materials via voltage-driven ion motion. This effect largely relies on the strength and penetration of the induced electric field into the target material, the amount of generated ion transport pathways, and the ionic mobility inside the magnetic media. Optimizing all these factors in a simple way is a huge challenge, although highly desirable for technological applications. Here, we demonstrate that the introduction of suitable transition-metal elements to binary nitride compounds can drastically boost magneto-ionics. More specifically, we show that the attained magneto-ionic effects in CoN films (i.e., saturation magnetization, toggling speeds, and cyclability) can be drastically enhanced through 10% substitution of Co by Mn in the thin-film composition. Incorporation of Mn leads to transformation from nanocrystalline into amorphous-like structures, as well as from metallic to semiconducting behaviors, resulting in an increase of N-ion transport channels. Ab initio calculations reveal a lower energy barrier for CoMn–N compared to Co–N that provides a fundamental understanding of the crucial role of Mn addition in the voltage-driven magnetic effects. These results constitute an important step forward toward enhanced voltage control of magnetism via electric field-driven ion motion.


Tan, Z., Martins, S., Escobar, M., de Rojas, J., Ibrahim, F., Chshiev, M., …Sort, J. (2022). From Binary to Ternary Transition-Metal Nitrides: A Boost toward Nitrogen Magneto-Ionics. ACS Applied Materials and Interfaces, 14(39), 44581-44590.

Journal Article Type Article
Acceptance Date Sep 13, 2022
Online Publication Date Sep 21, 2022
Publication Date Oct 5, 2022
Deposit Date Dec 20, 2022
Publicly Available Date Dec 20, 2022
Journal ACS Applied Materials & Interfaces
Print ISSN 1944-8244
Electronic ISSN 1944-8252
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 14
Issue 39
Pages 44581-44590


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