Soft modes condensation in Raman spectra of (Pb–La)(Zr–Sn–Ti)O3 ceramics

Abstract

Low frequency Raman spectra of (Pb0.97La0.02)(Zr0.864Sn0.04Ti0.096)O3 ceramic samples have been studied near cubic to antiferroelectric phase transition at about 200∘C. A set of low frequency soft modes were observed restoring below the transition point, in addition to the known one above 100cm−1. These modes show strong damping anomalies at the transition point that supposes considerable intermode interactions via dampings.

Keywords

• PZT ceramics
• phase transition
• Raman scattering
• soft mode