Soft modes condensation in Raman spectra of (Pb-La)(Zr-Sn-Ti)O-3 ceramics

Vtyurin, Alexander N.; Krylov, Alexander S.; Krylova, Svetlana N.; Oreshonkov, Alexander S.; Wei, Xiaoyong; Feng, Yujun; Xu, Ran; Zhao, Tian Source: JOURNAL OF ADVANCED DIELECTRICS, 9 (3):10.1142/S2010135X19500243 JUN 2019

Low frequency Raman spectra of ( ${Pb}_{0.97}$ ${La}_{0.02})$ ( ${Zr}_{0.864}$ ${Sn}_{0.04}$ ${Ti}_{0.096})$ 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.