Issue 23, 2021

Enhanced ferroelectricity in NaNbO3–LaCoO3:Mn epitaxial thin film

Abstract

A (001)-oriented NaNbO3–LaCoO3:Mn thin film with enhanced ferroelectric properties was successfully deposited on a SrRuO3-buffered LaAlO3 substrate by radiofrequency magnetron sputtering. This epitaxial thin film modified by element doping shows a tetragonal ferroelectric structure and large remanent polarization (31 μC cm−2) with high Curie temperature (450 °C). The polarization fatigue tests demonstrate an improved fatigue resistance due to the reduced oxygen vacancies by element doping. Further X-ray absorption spectra experiments found that the split energy between Nb t2g and eg orbitals is reduced and the hybridization between transition metal d-O 2p is strengthened, leading to enhanced ferroelectric polarization.

Graphical abstract: Enhanced ferroelectricity in NaNbO3–LaCoO3:Mn epitaxial thin film

Supplementary files

Article information

Article type
Research Article
Submitted
16 Aug 2021
Accepted
02 Oct 2021
First published
05 Oct 2021

Inorg. Chem. Front., 2021,8, 5124-5129

Enhanced ferroelectricity in NaNbO3–LaCoO3:Mn epitaxial thin film

M. Yang, S. Li, Y. Wang, H. Qi, K. Lin, Q. Li and X. Xing, Inorg. Chem. Front., 2021, 8, 5124 DOI: 10.1039/D1QI01041G

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