Observation of ferroelectric domain patterns in nanocrystalline BaTiO3 ceramics

Scanning nonlinear dielectric microscopy measurements revealed temperature-dependent variations in contrast, which was attributed to domain rearrangements in 20nm BaTiO3 ceramics. The experiment result showed the presence of a-c 90° nanoferroelectric domains in 20nm BaTiO3 ceramics from 25to290°C; f...

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Bibliographic Details
Published in:Applied physics letters 2006-10, Vol.89 (15)
Main Authors: Deng, Xiangyun, Wang, Xiaohui, Chen, Liangliang, Wen, Hai, Li, Longtu
Format: Article
Language:English
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Summary:Scanning nonlinear dielectric microscopy measurements revealed temperature-dependent variations in contrast, which was attributed to domain rearrangements in 20nm BaTiO3 ceramics. The experiment result showed the presence of a-c 90° nanoferroelectric domains in 20nm BaTiO3 ceramics from 25to290°C; furthermore the piezoresponse hysteresis loops showed that the 20nm BaTiO3 ceramics were switchable and ferroelectricity was retained at the high temperature of 290°C, demonstrating the existence of nanoferroelectric domains and the ferroelectric phase still retained above Curie temperature in 20nm BaTiO3 ceramics, which confirmed the diffused phase transition character in nanograin BaTiO3 ceramics.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2360244