Dynamics of relaxor ferroelectrics
Disordered Systems and Neural Networks
2009-10-31 v1
Abstract
We study a dynamic model of relaxor ferroelectrics based on the spherical random-bond---random-field model and the Langevin equations of motion. The solution to these equations is obtained in the long-time limit where the system reaches an equilibrium state in the presence of random local electric fields. The complex dynamic linear and third-order nonlinear susceptibilities and , respectively, are calculated as functions of frequency and temperature. In analogy with the static case, the dynamic model predicts a narrow frequency dependent peak in , which mimics a transition into a glass-like state.
Cite
@article{arxiv.cond-mat/0010022,
title = {Dynamics of relaxor ferroelectrics},
author = {R. Pirc and R. Blinc and V. Bobnar},
journal= {arXiv preprint arXiv:cond-mat/0010022},
year = {2009}
}
Comments
15 pages, Revtex plus 5 eps figures