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The heat capacity Cexpt(T) of Na0.5Bi0.5TiO3 single crystals for the temperature range 5 to 186 K is reported for the first time. The broad maximum on CexptT—3 plot in the temperature range 10 K 〈 T 〈 25 K and rapid rise in this plot with decreasing temperature below ≈︂10 K was observed. This maximum can be represented by a single Einstein mode (51 cm—1), and the fitted Debye temperature (180 K) is close to the value obtained from pyroelectric measurement (185 K). The obtained data display non-Debye features and suggest glass-like properties of NBT at low temperatures.
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Suchanicz et al. (1997) studied this question.
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