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Crystal Structure, Magnetic, and Dielectric Properties of Aurivillius-Type Bi3Fe0.5Nb1.5O9



M W. Lufaso, W A. Schulze, L Misture, Terrell A. Vanderah


Bi3Fe0.5Nb1.5O9 was synthesized using conventional solid state techniques and its crystal structure refined by the Rietveld method using neutron powder diffraction data. The oxide adopts an Aurivillius-type structure with orthorhombic space group symmetry A21am. Fe and Nb are disordered on the same crystallographic site, within [(Fe,Nb)O6] octahedra which exhibit tilting and distortion to accommodate the bonding requirements of the Bi cations located in the perovskite double layers. The structural behavior is discussed using a bond valence analysis. Magnetic measurements indicate paramagnetic behavior down to 4 K. Measurements of dielectric properties and electrical resistivity exhibited changes near 250 C to 260 C which suggest a possible ferroelectric transition.
Journal of Solid State Chemistry


Aurivillus, crystal structure, dielectric properties, magnetic properties, polar


Lufaso, M. , Schulze, W. , Misture, L. and Vanderah, T. (2007), Crystal Structure, Magnetic, and Dielectric Properties of Aurivillius-Type Bi<sub>3</sub>Fe<sub>0.5</sub>Nb<sub>1.5</sub>O<sub>9</sub>, Journal of Solid State Chemistry (Accessed April 15, 2024)
Created October 28, 2007, Updated February 19, 2017