Disordered ferroelectricity in the PbTiO3/SrTiO3 superlattice thin film

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The PbTiO3/SrTiO3 superlattice thin films with a low volume fraction of PbTiO3 have not attracted much interest because they are thought to exhibit only a paraelectric state. In this study, we focus on a superlattice thin film with thin PbTiO3 (PTO) and thick SrTiO3 (STO) layers, wherein the hidden ferroelectricity in the thin PbTiO3 layer is revealed. Atomic scale imaging analysis and electron energy loss spectroscopy reveal the existence of a disordered ferroelectric polarization state without innate tetragonal distortion in the (6PTO/15STO)(5) superlattice. The piezoelectric force microscopy analysis confirms that this disordered ferroelectricity can enhance piezoelectric response. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license.
Publisher
AMER INST PHYSICS
Issue Date
2017-06
Language
English
Article Type
Article
Keywords

DOMAINS; PBTIO3

Citation

APL Materials, v.5, no.6, pp.066104

ISSN
2166-532X
DOI
10.1063/1.4986064
URI
http://hdl.handle.net/10203/225104
Appears in Collection
PH-Journal Papers(저널논문)
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