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Domain Evolution and Piezoelectric Response across Thermotropic Phase Boundary in (K,Na)NbO3-Based Epitaxial Thin Films
Luo, Jin; Sun, Wei; Zhou, Zhen; Bai, Yu; Wang, Zhan Jie; Tian, Guo; Chen, Deyang; Gao, Xingsen; Zhu, Fangyuan; 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.
2017-04-19
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume9Issue:15Pages:13315-13322
AbstractRecent research progress in (K,Na)NbO3 (KNN)-based lead-free piezoelectric ceramics has attracted increasing attention for their applications to microsystems or micro- electromechanical systems (MEMS) in the form of thin films. This work demonstrates that high-quality KNN-based epitaxial films can be synthesized by a conventional sol-gel method, whose phase structure and domain characteristics have been investigated with emphasis on the temperature effect. A monoclinic M-c structure is observed at room temperature in KNN-based epitaxial films, which is close to but different from the orthorhombic phase in bulk counterparts. Piezoresponse force microscopy (PFM) at elevated temperatures reveals continuous changes of ferroelectric domains in KNN films during heating and cooling cycles between room temperature and 190 degrees C. A distinct change in domain morphology is observed upon heating to 110 degrees C, accompanied by a clear variation of dielectric permittivity suggesting a thermotropic phase transition, which is revealed to belong to a M-c-M-A phase transition on the basis of structural and PFM analysis on local ferroelectric and piezoelectric behaviors. Enhanced piezoelectric response at the thermotropic phase boundary is observed,: which is attributed to active domains and/or nanodomains formed across the boundary. Domain engineering, by utilizing the phase transition should be important and effective in KNN-based films not only for property enhancement but also for its textured ceramics.; Recent research progress in (K,Na)NbO3 (KNN)-based lead-free piezoelectric ceramics has attracted increasing attention for their applications to microsystems or micro- electromechanical systems (MEMS) in the form of thin films. This work demonstrates that high-quality KNN-based epitaxial films can be synthesized by a conventional sol-gel method, whose phase structure and domain characteristics have been investigated with emphasis on the temperature effect. A monoclinic M-c structure is observed at room temperature in KNN-based epitaxial films, which is close to but different from the orthorhombic phase in bulk counterparts. Piezoresponse force microscopy (PFM) at elevated temperatures reveals continuous changes of ferroelectric domains in KNN films during heating and cooling cycles between room temperature and 190 degrees C. A distinct change in domain morphology is observed upon heating to 110 degrees C, accompanied by a clear variation of dielectric permittivity suggesting a thermotropic phase transition, which is revealed to belong to a M-c-M-A phase transition on the basis of structural and PFM analysis on local ferroelectric and piezoelectric behaviors. Enhanced piezoelectric response at the thermotropic phase boundary is observed,: which is attributed to active domains and/or nanodomains formed across the boundary. Domain engineering, by utilizing the phase transition should be important and effective in KNN-based films not only for property enhancement but also for its textured ceramics.
description.department[luo, jin ; sun, wei ; zhou, zhen ; li, jing-feng] tsinghua univ, sch mat sci & engn, state key lab new ceram & fine proc, beijing 100084, peoples r china ; [bai, yu ; wang, zhan jie] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china ; [tian, guo ; chen, deyang ; gao, xingsen] south china normal univ, inst adv mat, guangzhou 510006, guangdong, peoples r china ; [tian, guo ; chen, deyang ; gao, xingsen] south china normal univ, guangdong prov key lab quantum engn & quantum mat, guangzhou 510006, guangdong, peoples r china ; [zhu, fangyuan] chinese acad sci, shanghai inst appl phys, 239 zhangheng rd, shanghai 201204, peoples r china
KeywordLead-free Piezoelectric Domain Evolution Phase Transition Thermotropic Phase Boundary
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
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/321006/78179
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. Domain Evolution and Piezoelectric Response across Thermotropic Phase Boundary in (K,Na)NbO3-Based Epitaxial Thin Films[J]. ACS APPLIED MATERIALS & INTERFACES,2017,9(15):13315-13322.
APA Luo, Jin.,Sun, Wei.,Zhou, Zhen.,Bai, Yu.,Wang, Zhan Jie.,...&Li, JF .(2017).Domain Evolution and Piezoelectric Response across Thermotropic Phase Boundary in (K,Na)NbO3-Based Epitaxial Thin Films.ACS APPLIED MATERIALS & INTERFACES,9(15),13315-13322.
MLA Luo, Jin,et al."Domain Evolution and Piezoelectric Response across Thermotropic Phase Boundary in (K,Na)NbO3-Based Epitaxial Thin Films".ACS APPLIED MATERIALS & INTERFACES 9.15(2017):13315-13322.
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