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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2002     Display Documents



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ID: 7207.0, MPI für Festkörperforschung / FKF Publikationen 2002
The cubic-to-rhombohedral phase transition of Pb(Zn1/3Nb2/3)O3: a high-resolution x-ray diffraction study on single crystals
Authors:Lebon, A.; Dammak, H.; Calvarin, G.; Ahmedou, I. O.
Language:English
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Journal of Physics: Condensed Matter
Volume:14
Issue / Number:29
Start Page:7035
End Page:7043
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The cubic-to-rhombohedral (C-R) phase transition of the
ferroelectric relaxor Pb(Zn1/3Nb2/3O3) is investigated by means
of a high-resolution x-ray diffraction study on single
crystals. The phase transition is diffuse and spreads over the
temperature range T-CR = 385 +/- 5 K to T-R = 325 +/- 5 K.
Below T-CR, the cubic phase transforms progressively into
rhombohedral domains whose average size, about 60-70 nm in the
[111] direction, remains unchanged as temperature is lowered,
so no growth of the R-domains is observed. At TR, the
nanometric R-domains fully pave the crystal but structural
mismatches between adjacent domains generate stresses; which
increase as temperature is lowered. The anomalous broadening of
diffraction peaks of the R-phase, which originates from size
and strain effects, can be suppressed by applying a do electric
field, along the [111] direction, which transforms the
polydomain state into a rhombohedral quasi-monodomain state.
External Publication Status:published
Document Type:Article
Communicated by:Michaela Asen-Palmer
Affiliations:MPI für Festkörperforschung
External Affiliations:; Max Planck Inst Festkorperforsch, 1 Heisenbergstr, D-70569 Stuttgart, Germany
; Ecole Cent Paris, CNRS, UMR 8580, F-92295 Chatenay Malabry, France
Identifiers:ISI:000177433300008
ISSN:0953-8984
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