Ferroelectricity in antiferroelectric NaNbO3 crystal

Sodium niobate (NaNbO3, or NNO) is known to be antiferroelectric at temperatures between 45 and 753 K. Here we show experimentally the presence of the ferroelectric phase at temperatures between 100 and 830 K in the NNO crystals obtained by top-seeded solution growth. The ferroelectric phase and new...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2014-03, Vol.26 (12), p.125901-125901
Main Authors: Tyunina, M, Dejneka, A, Rytz, D, Gregora, I, Borodavka, F, Vondracek, M, Honolka, J
Format: Article
Language:English
Subjects:
Crystallization - methods
ferroelectric
Magnetic Fields
Materials Testing
Molecular Conformation
Niobium - chemistry
optical
Phase Transition
Sodium - chemistry
sodium niobate
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Summary:Sodium niobate (NaNbO3, or NNO) is known to be antiferroelectric at temperatures between 45 and 753 K. Here we show experimentally the presence of the ferroelectric phase at temperatures between 100 and 830 K in the NNO crystals obtained by top-seeded solution growth. The ferroelectric phase and new phase transitions are evidenced using a combination of thermo-optical studies by variable angle spectroscopic ellipsometry, Raman spectroscopy analysis, and photoelectron emission microscopy. The possibility for strain-induced ferroelectricity in NNO is suggested.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/26/12/125901