Effect of Substitution of Samarium and Lanthanum on Dielectric and Electrical Properties of Barium Titanate

Abstract

In this research paper, we report the dielectric and electric investigation of series of dielectric ceramics samples with structural formula Ba_2-xRe_4+2x/3Ti₈O₂₄ (where Re = Sm and La and x = 0.0, 0.2, 0.4 and 0.6). The dielectric parameters (i.e. dielectric constant and loss tangent) and ac conductivity are measured with impedance analyzer. This paper is presented to compare the effect of samarium and lanthanum doping on the properties of barium titanate. The research work concludes that lanthanum doping has more favorable effect on the properties. This paper also presents impedance analysis and V-I characteristics of all the samples. This is concluded that these properties are strongly dependent on frequency, temperature and composition. The investigation reports almost constant value of dielectric constant and very low loss tangent at lower temperatures.

Keywords:

• Barium titanate
• dielectric constant
• loss tangent
• AC conductivity
• impedance spectroscopy