Microstructure and charge-ordering transitions in LuFe2O4

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dc.creatorZhang, Y.
dc.creatorYang, H. X.
dc.creatorMa, C.
dc.creatorTian, H. F.
dc.creator*, J. Q. Li
dc.date2007-03-04
dc.date.accessioned2026-07-07T07:50:00Z
dc.date.available2026-07-07T07:50:00Z
dc.descriptionMicrostructure properties, phase transitions, and charge ordering in the LuFe2O4 materials have been extensively investigated by means of transmission electron microscopy (TEM). The (001) twins as a common defect frequently appear in the LuFe2O4 crystals along the c-axis direction, and the crystals across each boundary are rotated by 180 degree with respect to one another. The in-situ cooling TEM observations reveal remarkable temperature dependence of the superstructures in correlation with charger ordering (CO). The Fe2+, Fe3+, and Fe+2.5 ions are found to be crystallized in ordered stripes at the frustrated ground state characterized by a modulation with the wave vector of q1 =(1/3 1/3 2). In-situ heating TEM observations on LuFe2O4 clearly demonstrate that this modulation becomes evidently invisible above a critical temperature of about Tc=530K. These facts suggest that the CO should be the essential driving force for the structural transitions and ferroelectricity observed in present system.
dc.description23 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0703102
dc.identifierhttp://arxiv.org/abs/cond-mat/0703102
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/125028
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleMicrostructure and charge-ordering transitions in LuFe2O4
dc.typetext

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