A ferroelastic phase transition in Pb(Zr0.53Ti0.47)O-3:Gd

作者：Portelles J^*; Fuentes J; Durruthy Rodriguez M D; Duarte A; Raymond O; Heiras J; Cruz M P; Siqueiros J M

来源：Journal of Applied Physics, 2013, 114(6): 064108.

DOI：10.1063/1.4818334

A study of a new ferroelastic phase transition in Pb(Zr0.53Ti0.47)O-3:Gd detected at 144 degrees C, induced by Gd doping is presented. The existence of such phase transition is barely detectable in the permittivity vs. temperature curve; however, it is made evident through the analyses of the temperature coefficient of the resonant frequency T-kf dependence with temperature in the radial mode resonance spectrum. This coefficient has a sharp discontinuity at around 144 degrees C. Micro Raman spectra show that the Raman modes associated to Pb/Gd and (Zr/Ti)O-6 positioned at 93.6 cm(-1) E(1TO) and 144 cm(-1) E(1LO) have a minimum in intensity around 140 degrees C. Besides the modes of the tetragonal structure, there are the modes at 67.3 and 77.8 cm(-1) corresponding to a rhombohedral structure, appearing at all temperatures. The Raman intensity vs. temperature plots of the different modes shows a minimum around 140 degrees C that confirms the ferroelastic transition detected in the resonance spectrum.

• 出版日期2013-8-14