Highly (111)-orientated BiFeO3 thin film deposited on La0.67Sr0.33MnO3 buffered Pt/TiO2/SiO2/Si (100) substrate

TL;DR

This study demonstrates the successful growth of highly (111)-oriented BiFeO3 thin films on LSMO-buffered substrates, exhibiting excellent ferroelectric, dielectric, and magnetic properties suitable for magnetoelectric applications.

Contribution

The paper reports the first fabrication of highly (111)-oriented BiFeO3 thin films on LSMO-buffered substrates with enhanced multiferroic properties.

Findings

High remanent polarization (~210.7 μC/cm²) and dielectric constant (~116.8) at 1 kHz.

Long fatigue endurance up to 10^10 switching cycles.

Enhanced magnetic saturation (Ms=89.5 emu/cm³) due to LSMO layer.

Abstract

Multiferroic BiFeO3 (BFO) thin film exhibiting desired ferroelectric and enhanced magnetic properties was grown on La0.67Sr0.33MnO3 (LSMO) buffered Pt/TiO2/SiO2/Si substrates by off-axis RF magnetic sputtering, where a highly (111)-oriented texture was obtained. The BFO/LSMO thin film exhibits excellent ferroelectric and dielectric behaviors (2Pr ~210.7 {\mu}C/cm2, 2Ec~435 kV/cm, {\epsilon}r ~116.8, and tan{\delta} ~ 2.7% at 1 kHz), together with a long fatigue endurance up to 1010 switching cycles at amplitude of 300 kV/cm. An enhancement in magnetic behavior was also observed with Ms=89.5 emu/cm3, which is largely contributed from the magnetic layer of LSMO. The coexistence of ferroelectric and ferromagnetic properties in the double layered BFO/LSMO thin film makes it a promising candidate system for applications where the magnetoelectric behavior is required.