(Mg,Mn,Fe,Co,Ni)O: a rocksalt high-entropy oxide containing divalent Mn and Fe

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dc.contributor.authorPu, Yen_AU
dc.contributor.authorMoseley, Den_AU
dc.contributor.authorHe, Zen_AU
dc.contributor.authorPitike, KCen_AU
dc.contributor.authorManley, MEen_AU
dc.contributor.authorYan, Jen_AU
dc.contributor.authorCooper, VRen_AU
dc.contributor.authorMitchell, VDen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorJohannessen, Ben_AU
dc.contributor.authorHermann, RPen_AU
dc.contributor.authorCao, Pen_AU
dc.date.accessioned2024-12-05T21:33:44Zen_AU
dc.date.available2024-12-05T21:33:44Zen_AU
dc.date.issued2023-09-20en_AU
dc.date.statistics2024-11-20en_AU
dc.description.abstractHigh-entropy oxides (HEOs) have aroused growing interest due to fundamental questions relating to their structure formation, phase stability, and the interplay between configurational disorder and physical and chemical properties. Introducing Fe(II) and Mn(II) into a rocksalt HEO is considered challenging, as theoretical analysis suggests that they are unstable in this structure under ambient conditions. Here, we develop a bottom-up method for synthesizing Mn- and Fe-containing rocksalt HEO (FeO-HEO). We present a comprehensive investigation of its crystal structure and the random cation-site occupancy. We show the improved structural robustness of this FeO-HEO and verify the viability of an oxygen sublattice as a buffer layer. Compositional analysis reveals the valence and spin state of the iron species. We further report the antiferromagnetic order of this FeO-HEO below the transition temperature ~218 K and predict the conditions of phase stability of Mn- and Fe-containing HEOs. Our results provide fresh insights into the design and property tailoring of emerging classes of HEOs. © 2024 American Association for the Advancement of Science.en_AU
dc.description.sponsorshipThis work was financially supported by the Science for Technological Innovation (SfTI) Challenge program grant no. UOAX1604 (to P.C. and Y.P.). U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under contract no. DE-AC05-00OR22725 (to R.P.H., M.E.M., D.M., J.Y., and V.R.C.). We are grateful for beamtime at the Australian Synchrotron ID 17907 (to Y.P. and P.C.) and the Australian Centre for Neutron Scattering MI13169 (to Y.P. and P.C.).en_AU
dc.format.mediumPrint-Electronicen_AU
dc.identifier.articlenumbereadi8809en_AU
dc.identifier.citationPu, Y., Moseley, D., He, Z., Pitike, K. C., Manley, M. E., Yan, J., Cooper, V. R., Mitchell, V., Peterson, V. K., Johannessen, B., Hermann, R. P., & Cao, P. (2023). (Mg,Mn,Fe,Co,Ni)O: a rocksalt high-entropy oxide containing divalent Mn and Fe. Science Advances, 9(38), eadi8809. doi:10.1126/sciadv.adi8809en_AU
dc.identifier.issn2375-2548en_AU
dc.identifier.issue38en_AU
dc.identifier.journaltitleScience Advancesen_AU
dc.identifier.urihttps://doi.org/10.1126/sciadv.adi8809en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15782en_AU
dc.identifier.volume9en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Association for the Advancement of Scienceen_AU
dc.subjectMagnesiumen_AU
dc.subjectManganeseen_AU
dc.subjectIronen_AU
dc.subjectCobalten_AU
dc.subjectNickelen_AU
dc.subjectOxidesen_AU
dc.subjectChemical propertiesen_AU
dc.subjectEntropyen_AU
dc.subjectPhysical propertiesen_AU
dc.subjectOxygenen_AU
dc.subjectSynthesisen_AU
dc.subjectAntiferromagnetismen_AU
dc.title(Mg,Mn,Fe,Co,Ni)O: a rocksalt high-entropy oxide containing divalent Mn and Feen_AU
dc.typeJournal Articleen_AU
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