“…Lanthanum (La 3+ ) doping in PZT ceramics have been extensively studied but there are very little systematic study on the effect of substitution of other rare earths into PZT lattice [4]. The effect of Sm modification on PZT (65/35) ceramics showing high pyroelectric coefficient have been reported by Pramila et al [5]. Properties like Curie temperature, dielectric constant and dielectric loss of PZT ceramics are normally improved by modifying them * Corresponding author.…”