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The pyroelectric responses of conventionally poled films of polyvinylidene fluoride to a step input of radiation have been analyzed and shown to be well described by the superposition of two decaying exponentials governed by the thermal and the electrical time constants of the system respectively. The peak response of the pyroelectric current transient was observed to be proportional to both the pyroelectric coefficient d31 for PVF2 films of 25 μm thickness so that the peak current response curve may be used to evaluate p (T) and d31.
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Das-Gupta et al. (1980) studied this question.
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