Domain structure and electrical properties of β-BaB2O4 single crystals grown by direct czochralski method

Abstract

Domain structure of β-BaB2O4 (BBO) crystals were determined by chemical etching. It was found that crystals grown by the direct Czochralski method show mostly single-domain. Pyroelectric and piezoelectric properties of BBO were studied. Pyroelectric coefficient of BBO has positive sign and the value of the coefficient is p = (1.27 ± 0.08) × 10-5 C/m2K. Piezoelectric strain coefficients were: d33 = 0.15 × 10-11 C/N, d22 = 0.22 × 10-11 C/N and d31 = 0.049 × 10-11 C/N. Electrical conductivity of BBO was measured as a function of temperature in range 340-720°C. Arrhenius activation energy was 1.68 eV.