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

Published

Author(s)

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

Abstract

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.
Citation
Journal of Solid State Chemistry
Volume
180
Issue
10

Keywords

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

Citation

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