Multiple competing magnetic interactions in Na4Ni7(PO4)6

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dc.contributor.authorXia, Qen_AU
dc.contributor.authorWang, CHen_AU
dc.contributor.authorSchmid, Sen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2021-07-16T05:01:30Zen_AU
dc.date.available2021-07-16T05:01:30Zen_AU
dc.date.issued2019-07-22en_AU
dc.date.statistics2021-07-10en_AU
dc.description.abstractThe low-temperature magnetic behavior and ground state of the candidate sodium-ion battery cathode compound Na4Ni7(PO4)6 have been investigated by physical property measurements and neutron powder diffraction. On cooling, Na4Ni7(PO4)6 undergoes three successive long-range spin ordering transitions to Phase I (below TN = 17 K), Phase II (below TN′ = 9.1 K), and Phase III (below TN″ = 4.6 K) with ordering vectors [0, 1, 1/2], [0, 2/3, 1/2], and [∼0.076, 2/3, 1/2], respectively. All three magnetic phases can be described in terms of ferromagnetic Ni2+ stripes with antiferromagnetic interactions between them. The moment amplitude of all stripes is the same in Phase I but varies in Phase II, while Phase III is an incommensurate variation on Phase II. Phases I and II both feature a crystallographically unique Ni site with no ordered magnetic moment due to geometric frustration; the resolution of which may be the driving force behind the final transition to Phase III. Even among transition-metal phosphates, which typically show complex spin ordering due to competition between superexchange and super-superexchange (through PO4 linkers), Na4Ni7(PO4)6 has one of the richest magnetic phase diagrams explored so far. © 2019 American Chemical Societyen_AU
dc.identifier.citationXia, Q., Wang, C.-H., Schmid, S. A., Avdeev, M., & Ling, C. D. (2019). Multiple competing magnetic interactions in Na4Ni7(PO4)6. Journal of Physical Chemistry C, 123(32), 19828–19834. doi:10.1021/acs.jpcc.9b03993en_AU
dc.identifier.issn1932-7455en_AU
dc.identifier.issue32en_AU
dc.identifier.journaltitleJournal of Physical Chemistry Cen_AU
dc.identifier.pagination19828-19834en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.jpcc.9b03993en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11088en_AU
dc.identifier.volume123en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectPhase transformationsen_AU
dc.subjectLayersen_AU
dc.subjectMultigroup theoryen_AU
dc.subjectNuclear structureen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCathodesen_AU
dc.subjectSpinen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectTransition elementsen_AU
dc.subjectPhase diagramsen_AU
dc.titleMultiple competing magnetic interactions in Na4Ni7(PO4)6en_AU
dc.typeJournal Articleen_AU
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