Frequency dependence of pyroelectric response of polarized P(VDF/TFE) (0.98/0.02) 70 μm foil was studied and its amplitude-phase analysis is provided. A low frequency pyroelectric resonance is discovered. The resonance is observed in the case of thermal excitation of the foil close to the electrode being grounded during poling. The effect is explained by nonhomogeneous distribution of pyro- and piezoelectric activity. Moreover, influence of acoustic and electric field on the pyroelectric response is discussed from the application point of view.
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Morozovsky et al. (1994) studied this question.
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