TY - JOUR
T1 - Voltage-driven motion of nitrogen ions
T2 - a new paradigm for magneto-ionics
AU - de Rojas, Julius
AU - Quintana, Alberto
AU - Lopeandía, Aitor
AU - Salguero, Joaquín
AU - Muñiz, Beatriz
AU - Ibrahim, Fatima
AU - Chshiev, Mairbek
AU - Nicolenco, Aliona
AU - Liedke, Maciej O.
AU - Butterling, Maik
AU - Wagner, Andreas
AU - Sireus, Veronica
AU - Abad, Llibertat
AU - Jensen, Christopher J.
AU - Liu, Kai
AU - Nogués, Josep
AU - Costa-Krämer, José L.
AU - Menéndez, Enric
AU - Sort, Jordi
N1 - Funding Information:
Financial support by the European Research Council (2014-Consolidator Grant Agreement No. 648454 and 2019-Proof of Concept Grant Agreement N° 875018), the Spanish Government (MAT2017-86357-C3-1-R), the Generalitat de Catalunya (2017-SGR-292 and 2018-LLAV-00032), the French ANR (ANR-18-CE24-0017 Project “FEOrgSpin”) and FEDER (MAT2017-86357-C3-1-R and 2018-LLAV-00032) is acknowledged. ICN2 is funded by the CERCA program/Generalitat de Catalunya and supported by the Severo Ochoa Centres of Excellence program (Spanish Research Agency, grant no. SEV-2017-0706). Work at GU has been supported by SMART (2018-NE-2861), one of seven centers of nCORE, a Semiconductor Research Corporation program sponsored by NIST, and NSF (DMR−1905468, DMR−1828420). The PALS measurements were carried out at ELBE at the Helmholtz-Zentrum Dresden-Rossendorf e. V., a member of the Helmholtz Association. We would like to thank A.G. Attallah and E. Hirschmann for assistance during PALS.
Publisher Copyright:
© 2020, The Author(s).
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12
Y1 - 2020/12
N2 - 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.
AB - 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.
UR - https://ddd.uab.cat/record/233364
UR - http://www.scopus.com/inward/record.url?scp=85096217534&partnerID=8YFLogxK
U2 - https://doi.org/10.1038/s41467-020-19758-x
DO - https://doi.org/10.1038/s41467-020-19758-x
M3 - Artículo
C2 - 33208728
AN - SCOPUS:85096217534
VL - 11
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 5871
ER -