Direct observation of disorder and correlations in perovskite-structure ferroelectrics

1 August 1991

journal article
research article
Published by Taylor & Francis in Ferroelectrics

Vol. 120 (1) , 103-105
https://doi.org/10.1080/00150199108216805

Abstract

Recent studies of perovskite-structure ferroelectrics using x-ray absorption spectroscopy have provided evidence for local symmetry breaking in the high-temperature phases of these materials. Both x-ray absorption near edge structure (XANES) and extended x-ray absorption fine structure (EXAFS) measurements have been made. In each case, the results support the suggestion that the phase transitions in these systems have an order-disorder character rather than (or in addition to) a displacive one. This paper will summarize the published results1,2 and describe briefly new work which confirms and extends the initial findings.

Keywords

This publication has 8 references indexed in Scilit:

Pulsed laser deposition of oriented PbZr.54Ti.46O3
Ferroelectrics, 1991
Lattice dynamics and origin of ferroelectricity in ${BaTiO}_{3}$ : Linearized-augmented-plane-wave total-energy calculations
Physical Review B, 1990
Corridors-between-adjacent-sites model of the four phases of ${KNbO}_{3}$
Physical Review Letters, 1989
Extended X-Ray Absorption Fine Structure study of Potassium Niobate
MRS Proceedings, 1989
Concentration dependence of the octahedral ${Ti}^{4 +}$ center in ${LiNbO}_{3}$ : Its effect on refractive indices
Physical Review Letters, 1987
Use of one-electron theory for the interpretation of near edge structure in K-shell x-ray absorption spectra of transition metal complexes
The Journal of Chemical Physics, 1980
Extended x-ray-absorption fine-structure technique. III. Determination of physical parameters
Physical Review B, 1975
The chain structure of BaTiO3 and KNbO3
Solid State Communications, 1968