Diffuse phase transition and relaxor behavior in perovskites

Author

Schmitt, Heinz ; Simon, Doris ; Pitzius, Peter

Author_Institution

Fachbereich Phys., Univ. des Saarlandes, Saarbrucken, Germany

fYear

1992

fDate

30 Aug-2 Sep 1992

Firstpage

76

Lastpage

79

Abstract

A number of selected measurements which have been used to explore the different characteristics of the perovskite ABO₃ relaxors such as PLZT (La-doped lead zirconate titanate), lead scandium tantalate, and lead magnesium niobate are presented. In light of the experimental results, two different models are presented. One is based on compositional heterogeneities, while the other is based on intrinsic instabilities and the broken translation invariance of the lattice. A comparison of the two models shows that it is extremely difficult to distinguish between the two models

Keywords

dielectric relaxation; ferroelectric materials; ferroelectric transitions; lanthanum compounds; lead compounds; magnesium compounds; permittivity; scandium compounds; PLZT; Pb(ScTa)O₃; PbLaZrO3TiO3; PbMgO₃NbO₃; broken translation invariance; compositional heterogeneities; diffuse phase transition; intrinsic instabilities; lattice; perovskite ABO₃ relaxors; relaxor behavior; Composite materials; Dielectric constant; Dielectric measurements; Ferroelectric materials; Fluctuations; Frequency; Gaussian distribution; Optical polarization; Solid modeling; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on

Conference_Location

Greenville, SC

Print_ISBN

0-7803-0465-9

Type

conf

DOI

10.1109/ISAF.1992.300628

Filename

300628