Ferroelectric Q and antiferroelectric P phases' coexistence and local phase transitions in oxygen-deficient NaNbO sub(3) single crystal: micro-Raman, dielectric and dilatometric studies

• Published in: Journal of Raman spectroscopy Vol. 43; no. 8; pp. 1141 - 1145
• Main Authors: Shakhovoy, R A, Raevskaya, SI, Shakhovaya, LA, Suzdalev, D V, Raevski, I P, Yuzyuk, YuI, Semenchev, A F, El Marssi, M
• Format: Journal Article
• Language: English
• Published: 01.08.2012
• Subjects: Dielectrics; Dilatometry; Ferroelectric materials; Ferroelectricity; Micrometers; Phase transformations; Phases; Single crystals
• ISSN: 0377-0486; 1097-4555
• DOI: 10.1002/jrs.3140

Micro-Raman studies of oxygen-deficient gray-colored NaNbO sub(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 copyright 2012 John Wiley & Sons, Ltd. Micro-Raman studies of oxygen-deficient gray-colored NaNbO sub(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. For the first time, the sequence of phase transitions between antiferroelectric phase P and ferroelectric Q and N phases has been revealed.