Abstract
Single crystals of pure PbTiO3 were grown by a flux method using the PbO-TiO2-B2O3 mixture as a flux solution. A mechanical detwining treatment was carried out by applying pressure to the platelet edges of the crystals in order to eliminate 90° domains in the crystal. The temperature and frequency dependences of the dielectric permittivity of the crystals were measured and analyzed. It was found that the dielectric properties of PbTiO3 single crystals were explained as a superposition of the effects of dielectric relaxation, electric conduction and simple dielectricity. By analyzing frequency dependence of dielectric permittivity using an equivalent circuit, the relative dielectric permittivity tensors ε11/ε0 and ε33/ε0 of PbTiO3 at room temperature were determined to be 130 and 90, respectively.
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