Multiple competing magnetic interactions in Na4Ni7(PO4)6
dc.contributor.author | Xia, Q | en_AU |
dc.contributor.author | Wang, CH | en_AU |
dc.contributor.author | Schmid, S | en_AU |
dc.contributor.author | Avdeev, M | en_AU |
dc.contributor.author | Ling, CD | en_AU |
dc.date.accessioned | 2021-07-16T05:01:30Z | en_AU |
dc.date.available | 2021-07-16T05:01:30Z | en_AU |
dc.date.issued | 2019-07-22 | en_AU |
dc.date.statistics | 2021-07-10 | en_AU |
dc.description.abstract | The 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 Society | en_AU |
dc.identifier.citation | Xia, 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.9b03993 | en_AU |
dc.identifier.issn | 1932-7455 | en_AU |
dc.identifier.issue | 32 | en_AU |
dc.identifier.journaltitle | Journal of Physical Chemistry C | en_AU |
dc.identifier.pagination | 19828-19834 | en_AU |
dc.identifier.uri | https://doi.org/10.1021/acs.jpcc.9b03993 | en_AU |
dc.identifier.uri | https://apo.ansto.gov.au/dspace/handle/10238/11088 | en_AU |
dc.identifier.volume | 123 | en_AU |
dc.language.iso | en | en_AU |
dc.publisher | American Chemical Society | en_AU |
dc.subject | Phase transformations | en_AU |
dc.subject | Layers | en_AU |
dc.subject | Multigroup theory | en_AU |
dc.subject | Nuclear structure | en_AU |
dc.subject | Neutron diffraction | en_AU |
dc.subject | Cathodes | en_AU |
dc.subject | Spin | en_AU |
dc.subject | Antiferromagnetism | en_AU |
dc.subject | Transition elements | en_AU |
dc.subject | Phase diagrams | en_AU |
dc.title | Multiple competing magnetic interactions in Na4Ni7(PO4)6 | en_AU |
dc.type | Journal Article | en_AU |
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