Striped magnetic ground state of the ideal kagomé lattice compound Fe4Si2Sn7O16

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dc.contributor.authorLing, CDen_AU
dc.contributor.authorAllison, MCen_AU
dc.contributor.authorSchmid, Sen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorGardner, JSen_AU
dc.contributor.authorRyan, DHen_AU
dc.contributor.authorSoehnel, Ten_AU
dc.date.accessioned2021-09-08T00:31:34Zen_AU
dc.date.available2021-09-08T00:31:34Zen_AU
dc.date.issued2017-12-03en_AU
dc.date.statistics2021-09-06en_AU
dc.description.abstractWe have used representational symmetry analysis of neutron powder diffraction data to determine the magnetic ground state of Fe4Si2Sn7O16. We recently reported a long-range antiferromagnetic (AFM) Néel ordering transition in this compound at TN = 3.0 K, based on magnetisation measurements [1]. The only magnetic ions present are layers of high-spin Fe2+ (d6, S = 2) arranged on a perfect kagomé lattice (trigonal space group P-3m1). Below TN = 3.0 K, the spins on 2/3 of these magnetic ions order into canted antiferromagnetic chains, separated by the remaining 1/3 which are geometrically frustrated and show no long-range order down to at least T = 0.1 K [2]. Moessbauer spectroscopy shows that there is no static order on the latter 1/3 of the magnetic ions — i.e., they are in a liquid-like rather than a frozen state – down to at least 1.65 K. A heavily Mn-doped sample Fe1.45Mn2.55Si2Sn7O16 has the same ground state. Although the magnetic propagation vector k = (0, ½, ½) breaks hexagonal symmetry, we see no evidence for magnetostriction in the form of a lattice distortion within the resolution of our data. To the best of our knowledge, this type of magnetic order on a kagomé lattice has no precedent experimentally and has not been explicitly predicted theoretically. We will discuss the relationship between our experimental result and a number of theoretical models that predict symmetry-breaking ground states for perfect kagomé lattices.en_AU
dc.identifier.citationLing, C. D., Allison, M. C., Schmid, S. A., Avdeev, M., Gardner, J. S., Ryan, D. H., & Soehnel, T. (2017). Striped magnetic ground state of the ideal kagomé lattice compound Fe4Si2Sn7O16. Paper presented at CRYSTAL 31, the 31st Biennial Conference of the Society of Crystallographers in Australia and New Zealand, Pullman Bunker Bay, Western Australia, 3 – 7 December 2017. Retrieved from: https://crystal31.com/wp-content/uploads/2017/11/SCANZ-Crystal-31-2017-Book-of-Abstracts-FINAL.pdf#page=13en_AU
dc.identifier.conferenceenddate7 December 2017en_AU
dc.identifier.conferencenameCRYSTAL 31, the 31st Biennial Conference of the Society of Crystallographers in Australia and New Zealanden_AU
dc.identifier.conferenceplacePullman Bunker Bay, Western Australiaen_AU
dc.identifier.conferencestartdate3 December 2017en_AU
dc.identifier.urihttps://crystal31.com/wp-content/uploads/2017/11/SCANZ-Crystal-31-2017-Book-of-Abstracts-FINAL.pdf#page=13en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11628en_AU
dc.language.isoenen_AU
dc.publisherSociety of Crystallographers in Australia and New Zealanden_AU
dc.subjectNeutron diffractionen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectGround statesen_AU
dc.subjectCrystal latticesen_AU
dc.subjectMoessbauer spectrometersen_AU
dc.subjectMagnetizationen_AU
dc.titleStriped magnetic ground state of the ideal kagomé lattice compound Fe4Si2Sn7O16en_AU
dc.typeConference Abstracten_AU
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