An analysis of the ferroelastic transition in Pb(Zr0.53Ti0.47)O3:Gd through the elastic stiffness constant

The values of PZT53/47 doped with 0.6% Gd 2 O 3 show an anomalous behavior near 132°C as a consequence of a ferroelastic transition. A non-linear fit to the experimental data of the elastic stiffness variation shows that it behaves according to the theoretical law describing pseudoproper ferroelasti...

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Published inPhase transitions Vol. 94; no. 5; pp. 308 - 316
Main Authors de Armas Figueroa, Y., Portelles, J., López-Noda, Rene, Fuentes, J., Hmŏk, H'Linh, Siqueiros, Jesús M.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 04.05.2021
Taylor & Francis Ltd
Subjects
Coupling
Deformation
Elastic properties
ferroelastic transition
Frequency analysis
Gadolinium
Gadolinium oxides
hard mode spectroscopy
Maxima
Order parameters
Phase transitions
piezoelectric
Piezoelectricity
soft mode
Spectrum analysis
Stiffness
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Summary:The values of PZT53/47 doped with 0.6% Gd 2 O 3 show an anomalous behavior near 132°C as a consequence of a ferroelastic transition. A non-linear fit to the experimental data of the elastic stiffness variation shows that it behaves according to the theoretical law describing pseudoproper ferroelastic transitions. Through Raman spectrum analysis, the frequency of soft mode A 1 (1TO) has a minimum in the 132-136°C temperature interval associated with the coupling to the component of the deformation. The quantitative evaluation of the order parameter by hard mode spectroscopy ratified the occurrence of a ferroelastic phase transition. The behavior of both piezoelectric coefficients d 31 and the electromechanical coupling factor k 31 can be taken as evidence of the transition showing local maxima at 138°C as a consequence of the maximum deformation during the oscillations of the A 1 (1TO) mode.
ISSN:0141-1594
1029-0338
DOI:10.1080/01411594.2021.1932883