Title :
The crystal chemistry of BiFeO3-based ferroelectrics
Author :
Woodward, D.I. ; Reaney, I.M. ; West, A.R. ; Randall, C.A.
Author_Institution :
Dept. of Eng. Mater., Univ. of Sheffield, UK
fDate :
28 May-1 June 2002
Abstract :
X-ray diffraction and transmission electron microscopy have been carried out on samples in the solid solution series (BiFeO3)x-(PbTiO3)1-x at x = 1, 0.8, 0.7, and 0.6. The amplitude of the antiphase tilt rotations of the FeO6 octahedra about the pseudocubic <111> axes in BiFeO3 has been shown to decrease on addition of PbTiO3. The tilt is absent in the tetragonal structure at x = 0.6. Both rhombohedral and tetragonal structures were found to coexist at x = 0.7, in the region of the morphotropic phase boundary. In addition, evidence of an intermediate phase was found in the same sample.
Keywords :
X-ray diffraction; bismuth compounds; crystal chemistry; crystal symmetry; ferroelectric materials; ferroelectric transitions; lead compounds; tilt boundaries; transmission electron microscopy; (BiFeO3)x-(PbTiO3)1-x; BiFeO3-PbTiO3; BiFeO3-based ferroelectrics; FeO6 octahedra; X-ray diffraction; antiphase tilt rotations; crystal chemistry; intermediate phase; morphotropic phase boundary; rhombohedral structures; tetragonal structure; transmission electron microscopy; Chemistry; Ferroelectric materials; Grain size; Microstructure; Pins; Reflection; Region 10; Transmission electron microscopy; X-ray scattering;
Conference_Titel :
Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on
Print_ISBN :
0-7803-7414-2
DOI :
10.1109/ISAF.2002.1195871
