Passive Voltage Amplification in FE-FE-DE Heterostructure

Abstract

In this article, we have studied passive voltage amplification in FE-FE-DE heterostructure. We have stacked two different ferroelectric oxides; one is second-order transition ferroelectric material (continuous transition ferroelectric material) and the other is first-order transition ferroelectric material (discontinuous transition ferroelectric material). Both ferroelectric materials have different polarities of anisotropy constant (𝜷), which is tuned by varying the ferroelectric thickness and thus leads to its cancellation. The nullification of the anisotropy constant will reduce the nonlinearity of the ferroelectric oxide and provide efficient matching between the ferroelectric and dielectric capacitance, which in turn delivers the higher voltage amplification in the heterostructure. Also, dynamic response and temperature analysis of heterostructure are studied further. It is observed that dielectric when added in series with the isolated ferroelectric capacitor the curie temperature shifts to a lower value.