Structural instabilities, incommensurate modulations and P and Q phases in sodium niobate in the temperature range 300-500 K

L. A. Reznichenko*, L. A. Shilkina, E. S. Gagarina, I. P. Raevskiǐ, E. A. Dul'kin, E. M. Kuznetsova, V. V. Akhnazarova

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The relation between the phase transition in the vicinity of 420 K discovered earlier and the formation of an incommensurate phase in the temperature range 410-460 K is established based on the X-ray, dielectric, and dilatometric studies of sodium niobate (NaNbO3) single crystals and ceramics. It is also established that this phase is characterized by temperature and temporal instabilities. Anomalies in some physical characteristics in the vicinity of 350 K are revealed. It is also shown that the thermodynamic history of the samples is important for the coexistence of the regions of the ferroelectric Q and antiferroelectric P phases in NaNbO3.

Original languageAmerican English
Pages (from-to)448-456
Number of pages9
JournalCrystallography Reports
Volume48
Issue number3
DOIs
StatePublished - May 2003

Bibliographical note

Funding Information:
ACKNOWLEDGMENTS This study was supported by the Russian Foundation for Basic Research, project no. 99-02-17575.

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