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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
ISSN2199-160X
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
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):-.
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