Abstract
Pure and 0.3 at% Fe-doped 0.71PMN–0.29PT single crystals were grown by a modified Bridgman method. The dielectric and ferroelectric properties of the ⟨1 1 1⟩-oriented crystals were investigated. Two dielectric anomaly peaks were observed in the dielectric constant versus temperature curve for both pure and Fe-doped crystals. The dielectric constant and loss of the Fe-doped crystal were 460 and 0.001 at 1 kHz, respectively; those of pure crystal were much larger than the Fe-doped crystal. The coercive field of the Fe-doped crystal achieved ∼0.8 kV mm−1, about twice that of pure crystal. Also the domain structure of the poled crystals was observed. In this paper, the effects of the Fe doping and doping mechanism are discussed.
Published Version
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