Journal
JOURNAL OF ADVANCED DIELECTRICS
Volume 3, Issue 4, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S2010135X1350032X
Keywords
Ferroelectricity; barium titanate; specific heat; fluctuations
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Funding
- RFBR [11-02-01317-a]
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Specific heat of barium titanate single crystals of different quality has been precisely measured with special attention to the temperature region above the ferroelectric phase transition. It was assumed that excess specific heat in the paraelectric phase has a fluctuation nature and the experimental data were analyzed in the framework of Levanyuk's theory for multiaxial ferroelectrics. Within this approach the correlation parameter delta is estimated to be 0.66 x 10(-16) cm(2) for Remeika-type crystals and 0.45 x 10(-16) cm(2) for TSSG (top-seeded solution growth) crystals. These values are in good accordance with earlier estimations.
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