PbO-Cu₂O系フラックスを用いて育成したPbTiO₃単結晶の電気的性質

抄録

The growth of PbTiO₃ single crystals from PbO-Cu₂O flux method and the electrical properties of the grown single crystals were studied. (1) PbTiO₃ crystals grown from a PbO-Cu₂O (7wt%) were single crystals, and had a maximum dimension of 4.5×4.5×1.7mm³. (2) All crystals contained less than 0.01wt% Cu ion. Therefore, crystals doped with Cu ion may be showed no variation of the lattice constant. (3) Electrical properties of the crystals were affected by Cu ion. The electrical conductivity of crystals was very low (about 10^-12S⋅cm^-1) at room temperature. At temperature about 300°C, the current-voltage characteristic curve revealed that the crystal doped with Cu ion was characterized by ohmic and non-ohmic conduction. The critical field strength, E_H value, decreased remarkably with increasing temperature.