Domain Evolution and Piezoelectric Response across Thermotropic Phase Boundary in (K,Na)NbO3-Based Epitaxial Thin Films
Luo, J; Sun, W; Zhou, Z; Bai, Y; Wang, ZJ; Tian, G; Chen, DY; Gao, XS; Zhu, FY; Li, JF
2017
发表期刊ACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
卷号9期号:15页码:13315-13322
文章类型期刊论文
摘要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.
关键词Lead-free Piezoelectric Domain Evolution Phase Transition Thermotropic Phase Boundary
DOI10.1021/acsami.7b02263
收录类别SCI
语种英语
WOS记录号WOS:000399965700045
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27301
专题中科院上海应用物理研究所2011-2018年
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Luo, J,Sun, W,Zhou, Z,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, J.,Sun, W.,Zhou, Z.,Bai, Y.,Wang, ZJ.,...&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, J,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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