Piezoelectricity in La0.85Ce0.15MnO3 layer of BiFeO3/La0.85Ce0.15MnO3 based ferroelectric/semiconductor oxide superlattice

Abstract

Superlattice comprising of ferroelectric (FE) and non-ferroelectric (non-FE) material has been developed to induce a ferroelectric response in the non-ferroelectric layer. In this study, a superlattice thin film comprising of BiFeO3 (BFO) as FE oxide and La0.85Ce0.15MnO3 (LCMO) as semiconducting non-FE oxide is fabricated and investigated the FE and piezoelectric responses in LCMO. We observed the piezoelectric response of individual layers using time-resolved X-ray microdiffraction experiment under an external electric field. Piezoelectric response of individual layers was resolved by comparing it with the values obtained from kinematic diffraction calculation. Piezoelectric coefficient (d(33)) of LCMO monolayer is found to be approximately 27 pm/V, which is a similar value as that of the BFO layer.