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Voltage-driven motion of nitrogen ions: a new paradigm for magneto-ionics.

ABSTRACT: Magneto-ionics, understood as voltage-driven ion transport in magnetic materials, has largely relied on controlled migration of oxygen ions. Here, we demonstrate room-temperature voltage-driven nitrogen transport (i.e., nitrogen magneto-ionics) by electrolyte-gating of a CoN film. Nitrogen magneto-ionics in CoN is compared to oxygen magneto-ionics in Co₃O₄. Both materials are nanocrystalline (face-centered cubic structure) and show reversible voltage-driven ON-OFF ferromagnetism. In contrast to oxygen, nitrogen transport occurs uniformly creating a plane-wave-like migration front, without assistance of diffusion channels. Remarkably, nitrogen magneto-ionics requires lower threshold voltages and exhibits enhanced rates and cyclability. This is due to the lower activation energy for ion diffusion and the lower electronegativity of nitrogen compared to oxygen. These results may open new avenues in applications such as brain-inspired computing or iontronics in general.

SUBMITTER: de Rojas J

PROVIDER: S-EPMC7676264 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Voltage-driven motion of nitrogen ions: a new paradigm for magneto-ionics.

de Rojas Julius J Quintana Alberto A Lopeandía Aitor A Salguero Joaquín J Muñiz Beatriz B Ibrahim Fatima F Chshiev Mairbek M Nicolenco Aliona A Liedke Maciej O MO Butterling Maik M Wagner Andreas A Sireus Veronica V Abad Llibertat L Jensen Christopher J CJ Liu Kai K Nogués Josep J Costa-Krämer José L JL Menéndez Enric E Sort Jordi J

Nature communications 20201118 1

Magneto-ionics, understood as voltage-driven ion transport in magnetic materials, has largely relied on controlled migration of oxygen ions. Here, we demonstrate room-temperature voltage-driven nitrogen transport (i.e., nitrogen magneto-ionics) by electrolyte-gating of a CoN film. Nitrogen magneto-ionics in CoN is compared to oxygen magneto-ionics in Co<sub>3</sub>O<sub>4</sub>. Both materials are nanocrystalline (face-centered cubic structure) and show reversible voltage-driven ON-OFF ferromagn ...[more]

PMID: 33208728

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Dataset Information

Voltage-driven motion of nitrogen ions: a new paradigm for magneto-ionics.

Publications

Voltage-driven motion of nitrogen ions: a new paradigm for magneto-ionics.

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