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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
Source PublicationWILEY
ISSN2199-160X
Volume3Issue:10Pages:-
AbstractMonoclinic 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.
description.department[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
KeywordFerroelectrics Lead-free Piezoelectrics Monoclinic Phase Phase Transitions Polarization Rotation
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational Nature Science Foundation of China [51332002]; Ministry of Science and Technology of China [2015CB654605]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79058
Collection中国科学院金属研究所
Corresponding AuthorLi, JF (reprint author), Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China.
Recommended Citation
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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