Abstract
Single crystals of pure PbTiO3 were grown by a flux method and a mechanical detwining treatment was carried out to eliminate 90° domain walls in the crystal. The temperature and frequency dependencies of complex dielectric permittivity of the crystals were measured and analyzed. It was found that the dielectric dispersion of PbTiO3 single crystal was explained as a superimposed effect of dielectric relaxation, electric conduction and simple dielectricity. By analyzing frequency dispersion of dielectric permittivity using an equivalent circuit, the relative dielectric permittivity tensors ε11/ε0 and ε33/ε0 of PbTiO3 at room temperature was determined to be 130 and 90, respectively.
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