Physics of the Solid State
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Thermophysical properties and phase transitions of ferroelectric PbFe0.5Nb0.5O3 at high temperatures
The thermophysical properties of the ferroelectric PbFe0.5Nb0.5O3 in the temperature range 300-800 K are studied. Anomalies in the heat capacity and thermal diffusion are found in the region of the diffuse ferroelectric transition Tc~380 K, the Burns temperature Td~670 K, and the intermediate temperature T^*~470 K. The dominant phonon heat transfer mechanisms in a ferroelectric with a nanopolar structure. Keywords: heat capacity, thermal diffusion, thermal conductivity, ferroelectric, phase transitions, relaxor.
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