The monoclinic phase of PZT ceramics: Raman and phenomenological theory studies
A. G. Souza Filho, K. C. V. Lima, A. P. Ayala, I. Guedes, P. T. C., Freire, J. Mendes Filho (Departamento de Fisica, Universidade Federal do, Ceara), E. B. Ara\'ujo, J. A. Eiras (Departamento de Fisica, Universidade, Federal de Sao Carlos)
TL;DR
This paper reports the first Raman detection of the tetragonal to monoclinic phase transition in PZT ceramics near the morphotropic phase boundary, confirming previous findings and analyzing phase stability with phenomenological theory.
Contribution
It provides the first Raman evidence of the phase transition in PZT ceramics and discusses the phase stability using Landau-Devonshire phenomenological theory.
Findings
Raman detection of phase transition near morphotropic boundary
Confirmation of previous X-ray and dielectric results
Analysis of phase stability with phenomenological theory
Abstract
This work reports on the first Raman detection of the tetragonal to monoclinic phase transition in PZT ceramics near morphotropic phase boundary at low temperatures. The transition is characterized by changes in the frequency of lattice modes with the temperature. The results presented here confirm the previous one recently reported by Noheda et al. using high-resolution synchrotron X-ray powder diffraction technique and dielectric measurements. The stability of the new phase is discussed within the framework of phenomenological Landau-Devonshire Theory.
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