Premium
A Novel Multiple Interface Structure with the Segregation of Dopants in Lead‐Free Ferroelectric (K 0.5 Na 0.5 )NbO 3 Thin Films
Author(s) -
Li Chao,
Wang Lingyan,
Chen Wen,
Lu Lu,
Nan Hu,
Wang Dawei,
Zhang Yijun,
Yang Yaodong,
Jia ChunLin
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201700972
Subject(s) - materials science , ferroelectricity , thin film , dopant , doping , natural bond orbital , crystal structure , polarization (electrochemistry) , lattice constant , chemical physics , chemical engineering , crystallography , nanotechnology , dielectric , chemistry , optoelectronics , computational chemistry , density functional theory , optics , diffraction , physics , engineering
Abstract Interfaces in oxides are found to possess different properties and can be engineered for modifying local structure and properties of nearby area. In this work, it is reported that the interfaces can be formed in Ba/Zr (BZ)‐doped (K,Na)NbO 3 (KNN) thin films by cycles of chemical solution deposition using same precursor solution. In the films, a novel and special cross‐sectional structure is observed with periodic distribution of Ba‐rich and Zr‐rich layers. The Ba‐rich and Zr‐rich layers exhibit different strain, lattice parameters, and crystal structure, leading to an obvious effect on the general ferroelectric properties of the KNN‐based thin films. Moreover, the self‐polarization is also observed, which can be understood to originate from the formed built‐in field by layered distribution of Ba and Zr in the KNN‐BZ thin films.