Monoclinic (K,Na)NbO3 Ferroelectric Phase in Epitaxial Films

IMR OpenIR

	Monoclinic (K,Na)NbO3 Ferroelectric Phase in Epitaxial Films
	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.
	2017-10-01
发表期刊	WILEY
ISSN	2199-160X
卷号	3 期号:10 页码:-
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.
部门归属	[luo, jin ; sun, wei ; zhou, zhen ; lee, hyun-young ; wang, ke ; li, jing-feng] tsinghua univ, sch mat sci & engn, state key lab new ceram & fine proc, beijing 100084, peoples r china ; [zhu, fangyuan] chinese acad sci, shanghai inst appl phys, 239 zhangheng rd, shanghai 201204, peoples r china ; [bai, yu ; wang, zhan jie] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china
关键词	Ferroelectrics Lead-free Piezoelectrics Monoclinic Phase Phase Transitions Polarization Rotation
学科领域	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
资助者	National Nature Science Foundation of China [51332002]; Ministry of Science and Technology of China [2015CB654605]
收录类别	SCI
语种	英语
WOS记录号	WOS:000412593400008
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79058
专题	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):-.