Abstract
Long-range effects on the pyroelectric coefficient and susceptibility ofa ferroelectric bilayer with a ferroelectric interfacial coupling areinvestigated by use of the transverse Ising model within the frameworkof mean-field theory. The effects of the interfacial coupling and thetransverse field on the pyroelectric coefficient and susceptibility ofthe bilayer are investigated by taking into account the long-rangeinteraction. It is found that the pyroelectric coefficient andsusceptibility increase with the decrease of the magnitude of thelong-range interaction and the interfacial coupling when the temperatureis lower than the phase transition temperature. We also find that thestrong long-range interaction, the large transverse field and weakinterfacial coupling can lead to the disappearance of some of the peaksof the pyroelectric coefficient and susceptibility of the ferroelectricbilayer. The phase transition temperature increases with the increase ofthe strength of the long-range interaction, which is similar to theresults obtained in ferroelectric multi-layers or superlattice.
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