Structural and electrical properties of Nd³⁺ doped ferroelectric barium sodium niobate ceramics

Abstract

Ferroelectric polycrystalline samples of Ba₄Na₂Nb₁₀O₃₀ with rare earth neodymium ion, member of the family of TB, were prepared using a high temperature solid state reaction technique and studied their electrical properties in a range of temperature (RT-to 300 °C) at 1KHz. X-ray diffraction analysis of these compounds shows the formation of single phase tetragonal structure at room temperature. Detailed studies of the dielectric properties suggest that they have undergone diffuse ferroelectric–paraelectric phase transition well above the room temperature. It has also been found that as the concentration of the neodymium increases, Curie temperature observed to be decreased. Measurements of electrical DC Conductivity as a function of temperature suggest that the compounds have semi conductivity properties the temperature, with positive temperature coefficient of resistance (PTCR) behavior.

Keywords:

• Barium sodium niobate
• TB structure
• dielectric constant
• resistivity

Acknowledgment

The authors would like to thank Advanced Analytical Laboratory, Andhra University, Visakhapatnam, Andhra Pradesh, for financial support under DST-PURSE Programme.