Structural and dielectric properties of Pb(1−x)(Na0.5Sm0.5)xTiO3 ceramics
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A correlation between structure and vibrational properties related to a ferroelectric to paraelectric phase transition in perovskite Pb(1−x)(Na0.5Sm0.5)xTiO3 (0 ≤ x ≤ 0.5) (PNST-x) polycrystalline powders is discussed. Substitution leads to reduction of tetragonality which is associated with a shift of the phase transition to lower temperatures. The nature of the phase transition gets diffused with increasing substitution.