Disordered ferroelectricity in the PbTiO3/SrTiO3 superlattice thin film
| Autor: | Kwang Ho Kim, James Paul Buban, Seog-Young Yoon, Gi-Yeop Kim, Kyung Song, Sung-Dae Kim, Jaichan Lee, Kanghyun Chu, Chan-Ho Yang, Si-Young Choi, Kil-Dong Sung, Taekjib Choi, Hak-Sung Lee |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Condensed matter physics Superlattice Electron energy loss spectroscopy lcsh:Biotechnology General Engineering 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Piezoelectricity Atomic units lcsh:QC1-999 Tetragonal crystal system lcsh:TP248.13-248.65 0103 physical sciences General Materials Science Thin film 010306 general physics 0210 nano-technology lcsh:Physics |
| Zdroj: | APL Materials, Vol 5, Iss 6, Pp 066104-066104-6 (2017) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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