Disordered ferroelectricity in the PbTiO3/SrTiO3 superlattice thin film

Gi Yeop Kim; Kanghyun Chu; Kil Dong Sung; Hak Sung Lee; Sung Dae Kim; Kyung Song; Taekjib Choi; Jaichan Lee; James P. Buban; Seog Young Yoon; Kwang Ho Kim; Chan Ho Yang; Si Young Choi

doi:10.1063/1.4986064

Disordered ferroelectricity in the PbTiO₃/SrTiO₃ superlattice thin film

Gi Yeop Kim, Kanghyun Chu, Kil Dong Sung, Hak Sung Lee, Sung Dae Kim, Kyung Song, Taekjib Choi, Jaichan Lee, James P. Buban, Seog Young Yoon, Kwang Ho Kim, Chan Ho Yang, Si Young Choi

Department of Advanced Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

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.

Original language	English
Article number	066104
Journal	APL Materials
Volume	5
Issue number	6
DOIs	https://doi.org/10.1063/1.4986064
State	Published - 1 Jun 2017

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title = "Disordered ferroelectricity in the PbTiO3/SrTiO3 superlattice thin film",

abstract = "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.",

author = "Kim, \{Gi Yeop\} and Kanghyun Chu and Sung, \{Kil Dong\} and Lee, \{Hak Sung\} and Kim, \{Sung Dae\} and Kyung Song and Taekjib Choi and Jaichan Lee and Buban, \{James P.\} and Yoon, \{Seog Young\} and Kim, \{Kwang Ho\} and Yang, \{Chan Ho\} and Choi, \{Si Young\}",

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doi = "10.1063/1.4986064",

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T1 - Disordered ferroelectricity in the PbTiO3/SrTiO3 superlattice thin film

AU - Kim, Gi Yeop

AU - Chu, Kanghyun

AU - Sung, Kil Dong

AU - Lee, Hak Sung

AU - Kim, Sung Dae

AU - Song, Kyung

AU - Choi, Taekjib

AU - Lee, Jaichan

AU - Buban, James P.

AU - Yoon, Seog Young

AU - Kim, Kwang Ho

AU - Yang, Chan Ho

AU - Choi, Si Young

PY - 2017/6/1

Y1 - 2017/6/1

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85021086882

U2 - 10.1063/1.4986064

DO - 10.1063/1.4986064

M3 - Article

AN - SCOPUS:85021086882

SN - 2166-532X

VL - 5

JO - APL Materials

JF - APL Materials

IS - 6

M1 - 066104

ER -

Disordered ferroelectricity in the PbTiO₃/SrTiO₃ superlattice thin film

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