Abstract
The dielectric and piezoelectric properties of the Mn-doped 0.71Pb(Mg1∕3Nb2∕3)O3–0.29PbTiO3 (PMNT) crystals oriented along ⟨001⟩ and ⟨110⟩ directions, respectively, have been investigated. The investigations have shown that 3at.% Mn substitution results in (i) a large increment of coercive field at the cost of piezoelectric response, (ii) an increased Curie temperature and an enhanced stability of the ferroelectric rhombohedral phase, which enable a wider operation temperature range, and (iii) enhanced linearity in electric field induced strain with lower hysteresis. The hardened PMNT crystals favor their applications in high power transducers.
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