Abstract

Large area tabular TGFB crystals with inhibited growth along the [001] direction were grown by doping the growth solution with selected monovalent cations. Irrespective of crystalline habit, the Curie temperature of TGFB was found to be T c = 73° ± 0.2° C, the Curie constant C = 2512° ± 80° and the ratio of the slope of the dielectric stiffness in the ferroelectric to that of the paraelectric region is ρ = − 3.99. At + 25° C, the spontaneous polarization P s = 3.7 × 10 −6 C cm 2 and the 50 c s “coercivity” is 1.1 kV cm . Crystalline imperfections introduced during growth are distributed anisotropically and have a marked effect upon the dielectric and ferroelectric polarization process in TGFB.

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