Magnetoelastic-magnetoelectric phase transitions in multiferroic BiFeO3

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dc.creatorRedfern, S. A. T.
dc.creatorWang, C.
dc.creatorHong, J. W.
dc.creatorCatalan, G.
dc.creatorScott, J. F.
dc.date2008-06-19
dc.date2008-06-23
dc.date.accessioned2026-07-07T09:45:49Z
dc.date.available2026-07-07T09:45:49Z
dc.descriptionOur measured dielectric constant and mechanical response of multiferroic BiFeO3 indicate four phase transitions below room temperature. Features correlate with those reported at 50K (from a peak in the zero-field-cooled magnetic susceptibility) and 230K (from splitting between field-cooled and zero-field-cooled magnetic data[1], and 200K (from magnon light scattering cross sections[2]). The primary order parameter is not the polarization in any of the low-T transitions. Instead, the transition near 230 K shows strong elastic coupling, while that at 50K is fundamentally magnetic, but magnetostrictively coupled to the the lattice. The low-T phase transitions display glassy behaviour. A further anomaly at 140K interpreted as spin reorientation[2,3] shows only weakly in dielectric and mechanical studies, indicating that it is predominantly magnetic with little coupling to any of the other order parameters.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0806.3241
dc.identifierhttp://arxiv.org/abs/0806.3241
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163321
dc.subjectMaterials Science
dc.titleMagnetoelastic-magnetoelectric phase transitions in multiferroic BiFeO3
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