Investigation on the nature of the Verwey transition in Cu-doped Fe3O4

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dc.contributor.authorKareri, Yen_AU
dc.contributor.authorChang, FFen_AU
dc.contributor.authorHester, JRen_AU
dc.contributor.authorUlrich, Cen_AU
dc.date.accessioned2022-05-27T05:29:16Zen_AU
dc.date.available2022-05-27T05:29:16Zen_AU
dc.date.issued2017-01-31en_AU
dc.date.statistics2021-09-24en_AU
dc.description.abstractMagnetite (Fe3O4), the oldest known magnet, is still a hotly debated material in scientific research, due to its complex magnetic, electronic and transport properties. One of the most interesting physical phenomena associated with Fe3O4 is the occurrence of a metal-insulator transition at ~120 K (TV), the so-called Verwey transition, which was associated with charge ordering below TV, accompanied by a structural transition from the cubic phase to the monoclinic phase. However, due to the twinning of crystal domains, the detailed crystallographic structure is not fully solved yet and different charge ordered and bond-dimerized ground states have been proposed. In order to overcome this problem, we have investigated Cu-doped Fe3O4 to approach the problem through the determination of the phase diagram of Fe1-xCuxFe2O4. Using neutron diffraction and high resolution X-ray synchrotron diffraction we have investigated both the crystallographic and magnetic structure of Cu-doped Fe3O4 in order to elucidate the effect of doping on the Verwey transition. Data obtained from both complementary diffraction techniques indicate that the Verwey transition temperature and the magnetic structure, in particular the magnetic moment, remain unchanged up to high doping levels of 85% Cu-substitution. This is a surprising result at first glance and required a systematic investigation. The analysis of our high resolution X-ray synchrotron diffraction data allowed us to extract detailed information on the precise doping mechanism, including the distribution of Cu-ions between tetrahedral and octahedral sites in the spinel structure. The diffraction data therefore provide valuable information on the detailed mechanism behind the Verwey transition.en_AU
dc.identifier.citationKareri, Y., Chang, F., Ulrich, C., & Hester, J. (2017). Investigation on the nature of the Verwey transition in Cu-doped Fe3O4. Poster presented to the 41st Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW, Australia, 31st January - 3rd February 2017. (pp. 45). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2017/Wagga_2017_Conference_Handbook.pdfen_AU
dc.identifier.conferenceenddate3 February 2017en_AU
dc.identifier.conferencenameAustralian and New Zealand Institutes of Physics 41st Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate31 January 2017en_AU
dc.identifier.otherWP4en_AU
dc.identifier.pagination45en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2017/Wagga_2017_Conference_Handbook.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13220en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectCoherent scatteringen_AU
dc.subjectDiffractionen_AU
dc.subjectIron oresen_AU
dc.subjectMineralsen_AU
dc.subjectPhysical propertiesen_AU
dc.subjectInelastic scatteringen_AU
dc.subjectThermodynamic propertiesen_AU
dc.subjectMagnetiteen_AU
dc.titleInvestigation on the nature of the Verwey transition in Cu-doped Fe3O4en_AU
dc.typeConference Posteren_AU
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