Document Type
Article
Publication Date
11-2010
Journal or Book Title
Zeitschrift für Kristallographie
Volume
226
Issue
2
First Page
99
Last Page
107
DOI
10.1524/zkri.2011.1299
Abstract
The complex structure of relaxor ferroelectrics comprises polar nanoregions (PNRs) which appear upon cooling below the Burns temperature and quenched compositional (chemical) disorder. The relation between the polar nanostructure and compositionally ordered regions (CORs) often observed in relaxors has been the subject of extensive theoretical investigations; however, the experimental data, especially concerning Pb(B′1/3B″2/3)O3-type complex perovskite relaxors, are rather limited. In this paper, we analyse and discuss the results of our recent investigations of the morphology of CORs and the dynamics of PNRs in Pb(Mg1/3Nb2/3)O3 based solid solutions in which the degree of compositional disorder was varied by means of changing the composition and/or by means of high-temperature annealing. The samples were characterised using X-ray diffraction, transmission electron microscopy, piezoresponse force microscopy, Brillouin light scattering, dielectric spectroscopy, as well as by measuring pyroelectric effect and ferroelectric hysteresis loops. No influence of the size of CORs on the PNRs relaxation in the ergodic relaxor phase is found. Instead, the CORs size influences significantly the diffuseness of the transition from the field-induced ferroelectric phase to the ergodic relaxor state. The results are interpreted in the framework of a model suggesting the coexistence of static and dynamic PNRs in the ergodic relaxor phase.
Copyright Owner
Oldenbourg Wissenschaftsverlag
Copyright Date
2010
Language
en
File Format
application/pdf
Recommended Citation
Bokov, Alexei A.; Rodriguez, Brian J.; Zhao, Xiaohui; Ko, Jae-Hyeon; Jesse, Stephen; Long, Xifa; Qu, Weiguo; Kim, Tae Hyun; Budai, John D.; Morozovska, Anna N.; Kojima, Seiji; Tan, Xiaoli; Kalinin, Sergei V.; and Ye, Zuo-Guang, "Compositional disorder, polar nanoregions and dipole dynamics in Pb(Mg1/3Nb2/3)O3-based relaxor ferroelectrics" (2010). Materials Science and Engineering Publications. 30.
https://lib.dr.iastate.edu/mse_pubs/30
Comments
This article is from Zeitschrift für Kristallographie 226 (2010): 99–107, doi:10.1524/zkri.2011.1299. The final publication is available at www.degruyter.com.