Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films

We report ferroelectricity and self-polarization in the (001) oriented ultrathin relaxor ferroelectric PMN-PT films grown on Nb-SrTiO(3), SrRuO(3) and La(0.7)Sr(0.3)MnO(3), respectively. Resistance-voltage measurements and AC impedance analysis suggest that at high temperatures Schottky depletion wi...

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Autores principales: Miao, Peixian, Zhao, Yonggang, Luo, Nengneng, Zhao, Diyang, Chen, Aitian, Sun, Zhong, Guo, Meiqi, Zhu, Meihong, Zhang, Huiyun, Li, Qiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4730210/
https://www.ncbi.nlm.nih.gov/pubmed/26817516
http://dx.doi.org/10.1038/srep19965
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author Miao, Peixian
Zhao, Yonggang
Luo, Nengneng
Zhao, Diyang
Chen, Aitian
Sun, Zhong
Guo, Meiqi
Zhu, Meihong
Zhang, Huiyun
Li, Qiang
author_facet Miao, Peixian
Zhao, Yonggang
Luo, Nengneng
Zhao, Diyang
Chen, Aitian
Sun, Zhong
Guo, Meiqi
Zhu, Meihong
Zhang, Huiyun
Li, Qiang
author_sort Miao, Peixian
collection PubMed
description We report ferroelectricity and self-polarization in the (001) oriented ultrathin relaxor ferroelectric PMN-PT films grown on Nb-SrTiO(3), SrRuO(3) and La(0.7)Sr(0.3)MnO(3), respectively. Resistance-voltage measurements and AC impedance analysis suggest that at high temperatures Schottky depletion width in a 4 nm thick PMN-PT film deposited on Nb-SrTiO(3) is smaller than the film thickness. We propose that Schottky interfacial dipoles make the dipoles of the nanometer-sized polar nanoregions (PNRs) in PMN-PT films grown on Nb-SrTiO(3) point downward at high temperatures and lead to the self-polarization at room temperature with the assistance of in-plane compressive strain. This work sheds light on the understanding of epitaxial strain effects on relaxor ferroelectric films and self-polarization mechanism.
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spelling pubmed-47302102016-02-03 Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films Miao, Peixian Zhao, Yonggang Luo, Nengneng Zhao, Diyang Chen, Aitian Sun, Zhong Guo, Meiqi Zhu, Meihong Zhang, Huiyun Li, Qiang Sci Rep Article We report ferroelectricity and self-polarization in the (001) oriented ultrathin relaxor ferroelectric PMN-PT films grown on Nb-SrTiO(3), SrRuO(3) and La(0.7)Sr(0.3)MnO(3), respectively. Resistance-voltage measurements and AC impedance analysis suggest that at high temperatures Schottky depletion width in a 4 nm thick PMN-PT film deposited on Nb-SrTiO(3) is smaller than the film thickness. We propose that Schottky interfacial dipoles make the dipoles of the nanometer-sized polar nanoregions (PNRs) in PMN-PT films grown on Nb-SrTiO(3) point downward at high temperatures and lead to the self-polarization at room temperature with the assistance of in-plane compressive strain. This work sheds light on the understanding of epitaxial strain effects on relaxor ferroelectric films and self-polarization mechanism. Nature Publishing Group 2016-01-28 /pmc/articles/PMC4730210/ /pubmed/26817516 http://dx.doi.org/10.1038/srep19965 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Miao, Peixian
Zhao, Yonggang
Luo, Nengneng
Zhao, Diyang
Chen, Aitian
Sun, Zhong
Guo, Meiqi
Zhu, Meihong
Zhang, Huiyun
Li, Qiang
Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films
title Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films
title_full Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films
title_fullStr Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films
title_full_unstemmed Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films
title_short Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films
title_sort ferroelectricity and self-polarization in ultrathin relaxor ferroelectric films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4730210/
https://www.ncbi.nlm.nih.gov/pubmed/26817516
http://dx.doi.org/10.1038/srep19965
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