Abstract
Rare-earth Nd-doped lead zinc niobate-lead titanate (Nd:PZN-PT) and W-doped lead zinc niobate-lead titanate (W:PZN-PT) single crystals have been grown by self-flux technique and their dielectric, ferroelectric and piezoelectric properties have been investigated. Pure perovskite phases were observed, and lattice parameters were obtained by Rietveld refinement. Diffuse phase transition and frequency dispersive phenomena was observed in the dielectric peaks confirming the enhancement of relaxor behaviour for doped crystals. Variation of dielectric constant (e), AC conductivity and piezoelectric charge coefficient (d33) as a result of doping is investigated in detail. From the hysteresis behaviour, it was evident that a simple domain switching mechanism was observed for doped crystals.
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