Single crystal neutron diffraction studies of low-temperature magnetic spin reorientation in Ca2Fe2O5

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dc.contributor.authorAuckett, JEen_AU
dc.contributor.authorLing, CDen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.date.accessioned2022-04-08T01:13:23Zen_AU
dc.date.available2022-04-08T01:13:23Zen_AU
dc.date.issued2013-12-15en_AU
dc.date.statistics2021-12-20en_AU
dc.description.abstractCa2Fe2O5 is a canted antiferromagnet (T{sub N} = 720 K) ) which displays an anomalous elevation in its magnetic susceptibility for 60 K T < 140 K. Based on susceptibility measurements performed on oriented single crystals, Zhou et al. [2] proposed a reorientation of the antiferromagnetic (AFM) easy-axis from the crystallographic a axis to the c axis below 40 K, proceeding via a region of minimal magnetocrystalline anisotropy in the anomalous temperature interval. In order to test this proposition, we have refined the atomic and magnetic structure of Ca{sub 2}F{sub e}2O{sub 5} against high-quality neutron Laue diffraction data collected on floating-zone-grown single crystals between 10 K and 300 K. An ad hoc sample mount was designed to apply a small (-35 Oe) magnetic field to the sample, ensuring perfect compatibility with the magnetic susceptibility data, which were also collected in a small field. Our refinements against both zero-field and in-field diffraction data reproduce the G-type AFM structure of Ca{sub 2}Fe{sub 2}O{sub 5} excellently at room temperature, including the known ferromagnetic canting. Careful examination of the refinement results reveals that the material is in fact best described by the room-temperature magnetic structure model as low as T=10 K, while the intermediate interval (measured at T=100 K) is characterised by subtle changes in the magnetic structure, including a reversal of the magnitudes of the magnetic moments on the two distinct Fe{sup 3+} sites.en_AU
dc.identifier.booktitle11th AINSE-ANBUG Neutron Scattering Symposium Abstracts, 2013en_AU
dc.identifier.citationAuckett, J. E., Ling, C. D., McIntyre, G. (2013). Single crystal neutron diffraction studies of low-temperature magnetic spin reorientation in Ca2Fe2O5. Presented at AANSS 2013 11th Neutron Scattering Symposium, Sydney, NSW, 2-3 Dec. In 11th AINSE-ANBUG Neutron Scattering Symposium Abstracts, 2013, pp. 48.en_AU
dc.identifier.conferenceenddate3 December 2013en_AU
dc.identifier.conferencenameAANSS 2013 11th Neutron Scattering Symposiumen_AU
dc.identifier.conferenceplaceSydney, NSWen_AU
dc.identifier.conferencestartdate2 December 2013en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12962en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineeringen_AU
dc.subjectSuperfluidityen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectMonocrystalsen_AU
dc.subjectSuperconductivityen_AU
dc.subjectAntiferromagnetic materialsen_AU
dc.subjectTemperature dependenceen_AU
dc.subjectCrystal structureen_AU
dc.subjectLaue methoden_AU
dc.subjectMagnetic momentsen_AU
dc.subjectOrientationen_AU
dc.titleSingle crystal neutron diffraction studies of low-temperature magnetic spin reorientation in Ca2Fe2O5en_AU
dc.typeConference Abstracten_AU
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