Dielectric and optic properties of PbZr1-xSnxO3 single crystals (0 ≤ x ≤ 0.2)

Temperature variations of linear birefringence An have been studied on flux-grown pure PbZrO3 and PbZr1-xSnxO3 (PZS-for short) single crystals (x = 0.01, 0.025, 0.05, 0.075, 0.1, 0,15, 0.2) in the range of temperature between 80 and 500 K. Linear birefringence was measured by means of polarising microscope using Senarmonte compensator. In the same samples changes of dielectric permittivity epsilon' was also measured in order to confirm temperature points of the phase transitions occurring in PZS crystals. In PZS with x greater than or equal to 0.05, two phase transitions T-1 (P-paraelectric to A(2)-antiferroelectic) and T-1 (A(1) to A(2) both antiferroelectric) were detected. For the concentrations of x < 0.05 PZS undergoes one phase transition (P -A(1)) as in pure PbZrO3. The optical studies were mainly performed in order to determine the character of the phase transitions in PZS. (C) 2003 Elsevier B.V. All rights reserved.