Anomalous synchrotron x-ray scattering studies of nanodomains in Pb(Mg1/3Nb2/3)O3

A. Tkachuk, Haydn Chen, P. Zschack, E. Colla

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A systematic study of the temperature dependence of superlattice reflections in the reciprocal space of a single crystal Pb(Mg1/3Nb22/3)O3 (PMN) was performed using anomalous x-ray scattering technique. Our studies confirm the existence of the two types of nanoregioris in PMN: a) chemically ordered nanodomains, and h) polar nanodomains formed by short-range correlated ionic displacements. No detailed temperature dependence of these superlattice reflections has been reported in the past. From monitoring the superlatttice reflections corresponding to polar nanodomains (i.e. QJ spots) over the temperature range 15K-800K, we found freezing temperature (Tf) of correlated atomic displacements was near 200 K. In contrast, chemically ordered nanodomains, which give rise to F type superlattice peaks, exhibited spherical shape over the entire temperature interval 15-800 K, This leads us to suspect that chemically ordered regions might be different and independent of polar nanodomains. In this paper we explain the contributions of different atomic displacements to a and F superlattice reflections in PMN. Correlation and competition between Pb displacements and the tilting of oxygen octahedra network are presented to understand the microstructural origin of the relaxor ferroelectric behavior.

Original languageEnglish
Title of host publicationFundamental Physics of Ferroelectrics 2000
Subtitle of host publicationAspen Center for Physics Winter Workshop
EditorsRonald E. Cohen, Richard A. Mewaldt
PublisherAmerican Institute of Physics Inc.
Pages136-142
Number of pages7
ISBN (Electronic)1563969599
DOIs
StatePublished - 12 Sep 2000
EventAspen Center for Physics Winter Workshop on Fundamental Physics of Ferroelectrics 2000 - Aspen, United States
Duration: 13 Feb 200020 Feb 2000

Publication series

NameAIP Conference Proceedings
Volume535
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceAspen Center for Physics Winter Workshop on Fundamental Physics of Ferroelectrics 2000
CountryUnited States
CityAspen
Period13/02/0020/02/00

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    Tkachuk, A., Chen, H., Zschack, P., & Colla, E. (2000). Anomalous synchrotron x-ray scattering studies of nanodomains in Pb(Mg1/3Nb2/3)O3. In R. E. Cohen, & R. A. Mewaldt (Eds.), Fundamental Physics of Ferroelectrics 2000: Aspen Center for Physics Winter Workshop (pp. 136-142). (AIP Conference Proceedings; Vol. 535). American Institute of Physics Inc.. https://doi.org/10.1063/1.1324449