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The anisotropy in the thermal diffusivity of uniaxial ferroelectric Sn 2 P 2 S 6 has been measured as a function of temperature using ac photopyroelectric calorimetry. The second-order ferroelectric transition has been studied in order to ascertain the mechanisms which could explain the anomaly in specific heat through the study of the inverse of the thermal diffusivity. Landau...
An ac photopyroelectric calorimeter has been used to study the thermal diffusivity of the ferroelectric semiconductors family (PbxSn1−x)2P2S6 (x=0.1 to 1) from low temperature to room temperature. A typical behaviour of poor thermal conduction has been observed, ascertaining the role of phonons as heat carriers. The substitution of Sn by Pb leads to an increase in thermal conduction due to the different...
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