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

作　　者：Zheng Ma P.Monalisha Zhengwei Tan Eva Pellicer Maciej O.Liedke Maik Butterling Ahmed G.Attallah Eric Hirschmann Andreas Wagner Fatima Ibrahim Mairbek Chshiev Enric Menendez Jordi Sort 

机构地区：[1]Departament de Física,Universitat Autònoma de Barcelona,Cerdanyola del Vallès,08193,Spain [2]Institute of Radiation Physics,Helmholtz-Zentrum Dresden–Rossendorf,Dresden,01328,Germany [3]University of Grenoble Alpes,CEA,CNRS,SPINTEC,Grenoble,38000,France [4]Institut Universitaire de France,Paris,75231,France [5]InstitucióCatalana de Recerca i Estudis Avançats(ICREA),Pg.Lluís Companys 23,Barcelona,08010,Spain

出　　处：《Journal of Materiomics》2024年第4期870-879,共10页无机材料学学报（英文）

基　　金：Financial support by the European Union's Horizon 2020 Research and Innovation Programme(BeMAGIC European Training Network,ETN/ITN Marie Skłodowska-Curie grant Nº861145);the European Research Council(2021-ERC-Advanced REMINDS Grant Nº101054687);the Spanish Government(PID2020-116844RBeC21,TED2021-130453B-C22 and PDC2021-121276-C31);the Generalitat de Catalunya(2021-SGR-00651);the MCIN/AEI/10.13039/501100011033&“European Union NextGenerationEU/PRTR”(grant CNS2022-135230)is acknowledged.

摘　　要：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 Co_(1−x)Fe_(x)N 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 Co_(0.3)5Fe_(0.65)N films exhibit an induced saturation magnetization of 1,500 emu/cm^(3),a magneto-ionic rate of 35.5 emu/(cm^(3)·s)and endurance exceeding 10^(3) cycles.These values significantly surpass those of other existing nitride and oxide systems.This improvement can be attributed to the larger saturation magnetization of Co_(0.35)Fe_(0.65) 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.

关 键 词：Voltage control of magnetism Magneto-ionics Electrolyte gating Ternary nitrides Ion transport 

分 类 号：TM91[电气工程—电力电子与电力传动]