Abstract
Undoped, Ce, and Co-doped Sr0.61Ba0.39Nb2O6 crystals were grown by the Czochralski method. The temperature dependence of dielectric constants was measured experimentally. The peak temperatures in dielectric constants of the doped crystals were detected to be lower by around 7 °C than that of the undoped crystal. Doping also results in the dispersion of ferroelectric phase transition due to the more disordered structure. Nonisoelectronic substitution of doping ions and lattice deformation are discussed by taking some properties of doping ion into account, such as radius, charge status, polarization, and concentration. The influences of the doping ions on the dielectric behaviors are also discussed. In Ce and Co double-doped crystals, the interaction between the two doping ions results in the compensation of the extra charges and counteraction of the structure deformation.