2008/11/10 by Donna C. Arnold, Kevin S. Knight, Finlay D. Morrison +1 · 2 citations
Materials Science · Physics and Astronomy · #Dielectric properties of ceramics #Ferroelectric and Piezoelectric Materials #Multiferroics and related materials #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.102.027602
published as Phys. Rev. Lett., 102, 027602, 2009
arxiv created 2008/11/10 · openalex publication_date 2009/01/16 · arxiv updated 2009/12/01 · openalex created_date 2017/03/16 · openalex updated_date 2026/07/28
A detailed investigation using variable temperature powder neutron diffraction demonstrates that BiFeO3 undergoes a phase transition from the ferroelectric \ensuremathα phase (rhombohedral, R3c) to a paraelectric \ensuremathβ phase (orthorhombic, Pbnm) between 820 \ifmmode^∘\else\textdegree\fiC and 830 \ifmmode^∘\else\textdegree\fiC. Coexistence of both phases over a finite temperature interval, together with abrupt changes in key structural parameters, confirms that the transition is first order. The \ensuremathβ phase corresponds to a GdFeO3-type perovskite structure.