Abstract
In this article, a comprehensive investigation of structural as well as electrical properties of Sm2O3-modified Bi4Ti3O12 (i.e. Bi3.8Sm0.2Ti3O12), a member of the Aurivillius family has been synthesized by using a mixed-oxide reaction technique. The sample crystallizes in orthorhombic symmetry (space group, B2ab). The electrical behaviors of the pure material, bismuth titanate are improved considerably by substituting a small amount (20%) of trivalent rare-earth (i.e. samarium) ion at its Bi-site. The electrical characteristics of the compound at different temperatures (25–500 °C) over a wide-ranging frequency (1 kHz–1 MHz) have shown several interesting features. The compound displays higher dielectric constant as well as lower tangent loss. The presence of ferroelectricity in the material is established by the P–E hysteresis loop. The J–E characteristics at various temperatures display the Ohmic conduction with a low leakage current that makes the material useful in several electronic industries.
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