Neutron Laue diffraction study of the complex low-temperature magnetic behaviour of brownmillerite-type Ca2Fe2O5

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dc.contributor.authorAuckett, JEen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorDe Bruyn, Hen_AU
dc.contributor.authorTan, TTen_AU
dc.contributor.authorLi, Sen_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2017-04-10T02:59:45Zen_AU
dc.date.available2017-04-10T02:59:45Zen_AU
dc.date.issued2015-01-01en_AU
dc.date.statistics2017-04-10en_AU
dc.description.abstractThe atomic and magnetic structure of brownmillerite Ca2Fe2O5 has been refined against single-crystal neutron Laue diffraction data collected at 300, 100 and 10 K under zero-field and low-magnetic field (35 Oe = 35 × 103/4[pi] A m-1) conditions. Ca2Fe2O5 is a canted G-type antiferromagnet with Pcm'n' symmetry, the magnetic moments on Fe being directed approximately along the crystallographic c axis at room temperature. The refinement results show clearly that this magnetic structure persists down to T = 10 K, despite a previous suggestion that an anomalous magnetic susceptibility enhancement observed in Ca2Fe2O5 single crystals between 40 and 140 K might signify a reorientation of the antiferromagnetic easy axis from c to a below 40 K. Alternative explanations for this susceptibility anomaly are considered in terms of the evidence for partial or short-range loss of order in the anomalous regime, possibly due to the presence of multiple competing sublattice interactions. © International Union of Crystallographyen_AU
dc.identifier.citationAuckett, J. E., McIntyre, G. J., Avdeev, M., De Bruyn, H., Tan, T. T., Li, S., & Ling, C. D. (2015). Neutron Laue diffraction study of the complex low-temperature magnetic behaviour of brownmillerite-type Ca2Fe2O5. Journal of Applied Crystallography, 48, 273-279. doi:10.1107/s1600576714027976en_AU
dc.identifier.govdoc8082en_AU
dc.identifier.issn1600-5767en_AU
dc.identifier.journaltitleJournal of Applied Crystallographyen_AU
dc.identifier.pagination273-279en_AU
dc.identifier.urihttp://dx.doi.org/10.1107/s1600576714027976en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/8538en_AU
dc.identifier.volume48en_AU
dc.language.isoenen_AU
dc.publisherInternational Union of Crystallographyen_AU
dc.subjectDiffractionen_AU
dc.subjectNeutronsen_AU
dc.subjectLaue methoden_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectTemperature range 0065-0273 Ken_AU
dc.subjectMonocrystalsen_AU
dc.titleNeutron Laue diffraction study of the complex low-temperature magnetic behaviour of brownmillerite-type Ca2Fe2O5en_AU
dc.typeJournal Articleen_AU
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