Optimizing magneto-ionic performance in structure/composition-engineered ternary nitrides

Magneto-ionics, an emerging approach to manipulate magnetism that relies on voltage-driven ion motion, holds the promise to boost energy efficiency in information technologies such as spintronic devices or future non-von Neumann computing architectures. For this purpose, stability, reversibility, en...

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Bibliographic Details
Authors: Ma, Zheng|||0000-0003-3655-1448, Peda, Monalisha|||0000-0002-3299-1254, Tan, Zhengwei|||0000-0003-4142-0637, Pellicer, Eva|||0000-0002-8901-0998, Liedke, Maciej Oskar|||0000-0001-7933-7295, Butterling, Maik|||0000-0003-3674-0767, Attallah, Ahmed|||0000-0002-7759-0315, Hirschmann, Eric, Wagner, Andreas|||0000-0001-7575-3961, Ibrahim, Fatima, Chshiev, Mairbek|||0000-0001-9232-7622, Menéndez, Enric|||0000-0003-3809-2863, Sort, Jordi|||0000-0003-1213-3639
Format: article
Publication Date:2024
Country:España
Institution:Universitat Autònoma de Barcelona
Repository:Dipòsit Digital de Documents de la UAB
Language:English
OAI Identifier:oai:ddd.uab.cat:288375
Online Access:https://ddd.uab.cat/record/288375
https://dx.doi.org/urn:doi:10.1016/j.jmat.2023.10.007
Access Level:Open access
Keyword:Voltage control of magnetism
Magneto-ionics
Electrolyte gating
Ternary nitrides
Ion transport
Description
Summary:Magneto-ionics, an emerging approach to manipulate magnetism that relies on voltage-driven ion motion, holds the promise to boost energy efficiency in information technologies such as spintronic devices or future non-von Neumann computing architectures. For this purpose, stability, reversibility, endurance, and ion motion rates need to be synergistically optimized. Among various ions, nitrogen has demonstrated superior magneto-ionic performance compared to classical species such as oxygen or lithium. Here, we show that ternary Co1-xFexN compound exhibits an unprecedented nitrogen magneto-ionic response. Partial substitution of Co by Fe in binary CoN is shown to be favorable in terms of generated magnetization, cyclability and ion motion rates. Specifically, the Co0.35Fe0.65N films exhibit an induced saturation magnetization of 1,500 emu/cm3, a magneto-ionic rate of 35.5 emu/(cm3·s) and endurance exceeding 103 cycles. These values significantly surpass those of other existing nitride and oxide systems. This improvement can be attributed to the larger saturation magnetization of Co0.35Fe0.65 compared to individual Co and Fe, the nature and size of structural defects in as-grown films of different composition, and the dissimilar formation energies of Fe and Co with N in the various developed crystallographic structures.

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