Tunable and temporally stable ferroelectric imprint through polarization coupling

TL;DR

This paper presents a method to tune and stabilize ferroelectric imprint in heterostructures by leveraging polarization coupling between ZnO and PbZrxTi(1-x)O3, with implications for durable ferroelectric devices.

Contribution

It introduces a novel approach to control ferroelectric imprint through polarization coupling, achieving stability over time and under electric stress.

Findings

Ferroelectric imprint varies linearly with ZnO thickness.

Imprint remains stable under electric cycling.

Method enables tunable, stable ferroelectric properties.

Abstract

Here we demonstrate a method to tune ferroelectric imprint, which is stable in time, based on the coupling between the non-switchable polarization of ZnO and switchable polarization of PbZrxTi(1-x)O3. SrRuO3/PbZrxTi(1-x)O3 /ZnO/SrRuO3 heterostructures were grown with different ZnO thicknesses. It is shown that the coercive voltages and ferroelectric imprint varies linearly with the thickness of ZnO. It is also demonstrated that the ferroelectric imprint remains stable with electric field cycling and electric field stress assisted aging.