Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

December 2007

Abstract

Despite intensive investigations over the past five decades, the microscopic origins of the fascinating dielectric properties of ABO3 relaxor ferroelectrics are currently poorly understood. Here, we show that the frequency dispersion that is the hallmark of relaxor behavior is quantitatively related to the crystal chemical characteristics of the solid solution. Density functional theory is used in conjunction with experimental determination of cation arrangement to identify the 0 K structural motifs. These are then used to parametrize a simple phenomenological Landau theory that predicts the universal dependence of frequency dispersion on the solid solution cation arrangement and off-center cation displacements.

Comments

Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. Reprinted in Physical Review Letters, Volume 99, Article 267603, December 2007, 4 pages.
Publisher URL: http://dx.doi.org/10.1103/PhysRevLett.99.267603

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Date Posted: 14 February 2008

This document has been peer reviewed.