Monoclinic (K,Na)NbO3 Ferroelectric Phase in Epitaxial Films
文献类型：期刊论文
| 作者 | Luo, Jin; Sun, Wei; Zhou, Zhen; Lee, Hyun-Young; Wang, Ke; Zhu, Fangyuan; Bai, Yu; Wang, Zhan Jie; Li, Jing-Feng; Li, JF (reprint author), Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China. |
| 刊名 | WILEY
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 3期号:10页码:- |
| 关键词 | Ferroelectrics Lead-free Piezoelectrics Monoclinic Phase Phase Transitions Polarization Rotation |
| ISSN号 | 2199-160X |
| 英文摘要 | 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 M-C 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 degrees C due to the monoclinic M-C-M-A 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.; 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 M-C 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 degrees C due to the monoclinic M-C-M-A 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. |
| 学科主题 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| 资助机构 | National Nature Science Foundation of China [51332002]; Ministry of Science and Technology of China [2015CB654605] |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79058]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li, JF (reprint author), Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Luo, Jin,Sun, Wei,Zhou, Zhen,et al. Monoclinic (K,Na)NbO3 Ferroelectric Phase in Epitaxial Films[J]. WILEY,2017,3(10):-. |
| APA | Luo, Jin.,Sun, Wei.,Zhou, Zhen.,Lee, Hyun-Young.,Wang, Ke.,...&Li, JF .(2017).Monoclinic (K,Na)NbO3 Ferroelectric Phase in Epitaxial Films.WILEY,3(10),-. |
| MLA | Luo, Jin,et al."Monoclinic (K,Na)NbO3 Ferroelectric Phase in Epitaxial Films".WILEY 3.10(2017):-. |
入库方式： OAI收割
来源：金属研究所
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