Detection of phase transitions in sodium bismuth titanate-barium titanate single crystals by acoustic emission

Acoustic emission measurements are combined with strain, dielectric, and polarization measurements to detect phase transitions in 0.94 Na 0.5 Bi 0.5 Ti O 3 - 0.06 Ba Ti O 3 single crystals during thermal cycling as well as electric field cycling at both room temperature and 140 ° C . All phase trans...

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Bibliographic Details
Published in:Applied physics letters 2008-01, Vol.92 (1), p.012904-012904-3
Main Authors: Dul'kin, E., Mojaev, E., Roth, M., Greicius, S., Granzow, T.
Format: Article
Language:English
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Summary:Acoustic emission measurements are combined with strain, dielectric, and polarization measurements to detect phase transitions in 0.94 Na 0.5 Bi 0.5 Ti O 3 - 0.06 Ba Ti O 3 single crystals during thermal cycling as well as electric field cycling at both room temperature and 140 ° C . All phase transitions known from the literature ( cubic ↔ tetragonal ↔ trigonal I ↔ trigonal II ) are determined to be of first order, and the existence of the ferroelectric trigonal II phase at room temperature and its transformation into an antiferroelectric phase during heating above 130 ° C is established.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2828698