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Long-range effects on the pyroelectric coefficient of a ferroelectricsuperlattice consisting of two different ferroelectric materials areinvestigated based on the Transverse Ising Model. The effects of theinterfacial coupling and the thickness of one period on the pyroelectriccoefficient of the ferroelectric superlattice are studied by taking intoaccount the long-range interaction. It is found that with the increase of thestrength of the long-range interaction, the pyroelectric coefficient decreaseswhen the temperature is lower than the phase transition temperature; the numberof the pyroelectric peaks decreases gradually and the phase transitiontemperature increases. It is also found that with the decrease of theinterfacial coupling and the thickness of one period, the phase transitiontemperature and the number of the pyroelectric peaks decrease.

Long-Range Effects on the Pyroelectric Coefficient of Ferroelectric Superlattice