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

Nature Communications
Julius de RojasJordi Sort

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.

References

Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Jan 1, 1993·Physical Review. B, Condensed Matter·G Kresse, J Hafner
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Aug 18, 2006·Nature·W EerensteinJ F Scott
Jan 20, 2007·Science·Martin WeisheitDominique Givord
Mar 5, 2014·Advanced Materials·Subho DasguptaHorst Hahn
Nov 18, 2014·Nature Materials·Uwe BauerGeoffrey S D Beach
Dec 15, 2015·Nano Letters·Qingyun ZhangHui Wu
Mar 22, 2016·Nature Communications·Dustin A GilbertKai Liu
Jun 28, 2016·Advanced Materials·Xiaojian ZhuWei D Lu
Jul 23, 2016·Nature Communications·Dustin A GilbertBrian B Maranville
Nov 14, 2017·Advanced Materials·Alan MolinariRobert Kruk
Nov 14, 2018·Nature Materials·Aik Jun TanGeoffrey S D Beach
Dec 14, 2018·Nature Materials·Chris Leighton
Sep 19, 2019·ACS Applied Materials & Interfaces·Shauna RobbennoltJordi Sort
Oct 2, 2019·Small·Markus GößlerRoland Würschum

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Citations

Jun 23, 2021·ACS Applied Materials & Interfaces·Julius de RojasJordi Sort
Aug 5, 2021·ACS Applied Materials & Interfaces·Peyton D MurrayKai Liu

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Methods Mentioned

BETA
transmission electron microscopy
X-ray

Software Mentioned

SPDevices
PALSfit
VASP package

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