Extrinsic Scaling Effects on the Dielectric Response of Grained BaTiO3 Films

A set of gradient stresses is used in Landau thermodynamic theory to explain the dielectric diffusion of BaTiO3 films grown on thick copper foils. Every grain in the films is treated as a single domain core that is surrounded by boundaries with low dielectric constant. The dielectric diffusion is ma...

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Bibliographic Details
Published in:Key engineering materials 2010-01, Vol.434-435, p.293-295
Main Authors: Chen, Qing Dong, Zhen, Zhi Qiang, Li, Xin Zhong, Li, Tong Wei, Li, Li Ben, Su, Li Qiu
Format: Article
Language:English
Subjects:
Barium titanates
Boundaries
Copper
Dielectric constant
Dielectrics
Diffusion
Foils
Grains
Phase transformations
Stresses
Thermodynamics
Thick films
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Summary:A set of gradient stresses is used in Landau thermodynamic theory to explain the dielectric diffusion of BaTiO3 films grown on thick copper foils. Every grain in the films is treated as a single domain core that is surrounded by boundaries with low dielectric constant. The dielectric diffusion is mainly induced by the diffusive phase transition caused by the gradient stresses. The low dielectric constant boundaries suppress the peak value of the dielectric constant. The results agree with the experiments.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.434-435.293