Pyroelectric, dielectric and thermal properties of TGS, DTGS and TGFB

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Abstract
The pyroelectric coefficient, dielectric constant, specific heat and thermal diffusivity of TGS, DTGS and TGFB have been measured as a function of temperature. At a given Tc — T, the deuteration seems to increase the pyroelectric coefficient by a factor 1.35, with a smaller increase in the dielectric constant. For TGFB a good Curie law of the dielectric constant has never been observed. The anomalies at Tc of both the specific heat and thermal diffusivity are much larger for TGFB than for TGS and DTGS. This is consistent with the different temperature variations of both the pyroelectric coefficient and dielectric constant. A discussion is given of the interest of DTGS and TGFB versus TGS, for pyroelectric detection.