当前位置: X-MOL 学术Adv. Electron. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Monoclinic (K,Na)NbO3 Ferroelectric Phase in Epitaxial Films
Advanced Electronic Materials ( IF 6.2 ) Pub Date : 2017-08-17 , DOI: 10.1002/aelm.201700226
Jin Luo 1 , Wei Sun 1 , Zhen Zhou 1 , Hyun-Young Lee 1 , Ke Wang 1 , Fangyuan Zhu 2 , Yu Bai 3 , Zhan Jie Wang 3 , Jing-Feng Li 1
Affiliation  

Monoclinic phases, as intermediate phases at the morphotropic phase boundary, have been considered as the origin of high piezoelectricity in various piezoelectric systems. However, those monoclinic phases have seldom been experimentally observed at the phase boundary in lead‐free (K,Na)NbO3 (KNN)‐based materials. This work shows that KNN epitaxial thin films demonstrate a monoclinic MC phase stabilized by elastic strain at room temperature, which is identified by both synchrotron X‐ray reciprocal space mapping and piezoresponse force microscopy. It is revealed that the piezoelectricity is greatly enhanced at 170 °C due to the monoclinic MC–MA phase boundary. The discovery of monoclinic phases in this work may open an avenue for developing a new thermotropic phase boundary in KNN‐based materials. The results also provide a guide for the exploration of high piezoelectricity driven by monoclinic phases in lead‐free piezoelectric materials.

中文翻译:

外延膜中的单斜(K,Na)NbO3铁电相

在变压电相边界处作为中间相的单斜晶相已被认为是各种压电系统中高压电性的起源。但是,在基于无铅(K,Na)NbO 3(KNN)的材料中,很少在相界处通过实验观察到那些单斜晶相。这项工作表明,KNN外延薄膜在室温下表现出通过弹性应变稳定的单斜相M C相,这由同步加速器X射线互易空间图谱和压电响应力显微镜确定。据透露,压电性在170℃下大大提高由于所述单斜晶中号Ç -M相界。在这项工作中发现单斜晶相可能为在基于KNN的材料中开发新的热变相边界开辟一条途径。研究结果也为探索无铅压电材料中单斜晶相驱动的高压电性提供了指导。
更新日期:2017-08-17
down
wechat
bug