Electrical properties of sol-gel processed barium titanate films

The sol-gel technique has been used to prepare ferroelectric barium titanate (BaTiO3) films. The electrical properties of the films have been investigated systematically. The room temperature dielectric constant (ϵ) and loss tangent (tanδ) at 1 kHz were respectively found to be 370 and 0.012. Both ϵ...

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Bibliographic Details
Published in:Thin solid films 1998-09, Vol.330 (2), p.178-182
Main Authors: Basantakumar Sharma, H., Sarma, H.N.K.
Format: Article
Language:English
Subjects:
Barium oxide
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric properties of solids and liquids
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Electrical properties
Exact sciences and technology
Ferroelectricity and antiferroelectricity
Liquid phase epitaxy
Niobates, titanates, tantalates, pzt ceramics, etc
Physics
Titanium oxide
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Summary:The sol-gel technique has been used to prepare ferroelectric barium titanate (BaTiO3) films. The electrical properties of the films have been investigated systematically. The room temperature dielectric constant (ϵ) and loss tangent (tanδ) at 1 kHz were respectively found to be 370 and 0.012. Both ϵ and tanδ showed anomaly peaks at 125°C. The room temperature remanant polarization (Pr) and coercive field (Ec) were found to be 3.2 μC/cm2 and 30 kV/cm, respectively. The capacitance–voltage (C–V) and conductance–voltage (G–V) characteristics also showed hysteresis effect. The temperature variation of C–V and G–V characteristics also confirms the ferroelectric to paraelectric phase transition at 125°C.
ISSN:0040-6090
1879-2731
DOI:10.1016/S0040-6090(98)00551-3