Abstract
We report on structural, dielectric and vibrational properties of the relaxor–ferroelectric system (1 − x)·Pb(Mn1/3Nb2/3)O3 – x·(PbTiO3) in the concentration range of 0.15 ≤ x ≤ 0.25. The range corresponds to a morphotropic (MPT) phase boundary between the rhombohedral R3m and tetragonal P4mm phases of the solid solution. The non-doped Pb(Mn1/3Nb2/3)O3 was of the R3m space group, demonstrating smeared phase transitions and relaxor behavior. Increasing concentration of the dopant led to a gradual suppression of the relaxor behavior with occurrence of a sharp first-order phase transition.
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