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Upward ferroelectric self-poling in (001) oriented PbZr0.2Ti0.8O3 epitaxial films with compressive strain

Authors :
Ying Luo
Xueyan Li
Lei Chang
Wenxiu Gao
Guoliang Yuan
Jiang Yin
Zhiguo Liu
Source :
AIP Advances, Vol 3, Iss 12, Pp 122101-122101-8 (2013)
Publication Year :
2013
Publisher :
AIP Publishing LLC, 2013.

Abstract

Upward self-poling phenomenon was observed in PbZr0.2Ti0.8O3 ferroelectric films which were grown on (001) SrTiO3 substrate with either p-type La0.7Sr0.3MnO3 or n-type SrRuO3 buffered layer, or on n-type (001) Nb-SrTiO3 substrate. Both upward self-poling and epitaxial strain are strong in the super-thin PbZr0.2Ti0.8O3 epitaxial films, while they become weak and finally disappear in thick epitaxial films or thin epitaxial films with high-density oxygen vacancies. Besides, both of them disappear in PbZr0.2Ti0.8O3 polycrystalline films on Pt/TiO2/SiO2/Si substrate. Therefore, the main origin of upward self-poling is epitaxial strain rather than p-n/Schottky junction or charged vacancies in PbZr0.2Ti0.8O3 epitaxial films here.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
3
Issue :
12
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.79e604baaf84ab8b7641c29265e050a
Document Type :
article
Full Text :
https://doi.org/10.1063/1.4840595