Moganti Venkata Someswara Rao, Kocharlakota Venkata Ramesh, Majeti Naga Venkata Ramesh, Bonthula Srinivasa Rao
Department of Physics, GIT, GITAM University, Visakhapatnam, India.
Department of Physics, S.R.K.R. Engineering College, Bhimavaram, India.
DOI: 10.4236/ampc.2013.31012   PDF    HTML   XML   5,075 Downloads   8,878 Views   Citations

Abstract

The modified BaTiO₃ ferroelectric materials are suitable for pyroelectric applications. This paper reports the structural, dielectric and electrical properties on copper influence in BaTiO₃ when it was substituted site “A” of perovskite structure of BaTiO₃. Copper has been chosen for modified BaTiO₃ with different concentrations with stoichiometry Ba_1-xCu_xTiO₃, where x = 0.01%, 0.02%, 0.03% and 0.04%. The X-ray diffraction patterns of the samples doped with different composition of CuO are found to be that the positions and intensities of the diffraction peaks are similar and no secondary phases were observed. The Curie’s temperature (T_c) for all CuO doped BaTiO₃ with were found to be in the range of 120°C to 125°C. The frequency dependence of relative permittivity (ε_r) and dielectric loss (Tanδ) of Ba_1-xCu_xTiO₃ samples at room temperature were reported in the range 100 KHz - 1 MHz. The temperature dependence of D.C electrical resistivity studies were reported for all samples indicating that the participation of Cu²⁺-Cu⁺ ions in the conduction process around their Curie’s temperature.

Keywords

Barium Titanate; Copper Doping; Dielectric Properties; DC Electrical Resistivity; Frequency Dependence

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Conflicts of Interest

The authors declare no conflicts of interest.

References

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