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Ferroelectric Q and antiferroelectric P phases' coexistence and local phase transitions in oxygen‐deficient NaNbO 3 single crystal: micro‐Raman, dielectric and dilatometric studies
Author(s) -
Shakhovoy R. A.,
Raevskaya S. I.,
Shakhovaya L. A.,
Suzdalev D. V.,
Raevski I. P.,
Yuzyuk Yu. I.,
Semenchev A. F.,
El Marssi M.
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.3140
Subject(s) - antiferroelectricity , raman spectroscopy , ferroelectricity , dielectric , phase transition , phase (matter) , materials science , oxygen , single crystal , chemistry , crystallography , analytical chemistry (journal) , condensed matter physics , optics , optoelectronics , physics , organic chemistry
Micro‐Raman studies of oxygen‐deficient gray‐colored NaNbO 3 single crystals have shown that at room temperature both antiferroelectric P and ferroelectric Q phases are present simultaneously as separate regions tens of micrometers in size. Phase transitions in P and Q regions have been elucidated by dielectric, dilatometric and micro‐Raman studies. For the first time, the sequence of phase transitions between antiferroelectric phase P and ferroelectric Q and N phases has been revealed. Copyright © 2012 John Wiley & Sons, Ltd.