A structural evidence of polar clusters in PLZT relaxor ceramics

Botero, Ériton Rodrigo; Azevedo, Douglas Henrique Marcelino de; Eiras, J. A.; Milton, Flávio Paulo; Garcia, D.

doi:10.1080/10584587.2016.1190596

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Aliovalent Cation Doped Ferroelectrics : La‐doped PZT (PLZT) is a typical system in this category, which is an important and well known relaxor system with outstanding dielectric and electro‐optic properties . In PLZT, the local structure and polar heterogeneity are thought to be associated with the random fields induced by La 3+ on the A‐site, accompanied with Pb vacancies and distinct electronic configuration of rare earth dopants, which can disrupt the long‐range ferroelectric or antiferroelectric ordering, leading to dielectric relaxation behavior …”

Section: State‐of‐the‐art Relaxor Ferroelectric Materials and Their Amentioning

confidence: 99%

Local Structural Heterogeneity and Electromechanical Responses of Ferroelectrics: Learning from Relaxor Ferroelectrics

Zhang

Damjanović

et al. 2018

Adv Funct Materials

327

228

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Long-range ordering of dipoles is a key microscopic signature of ferroelectrics. These ordered dipoles form ferroelectric domains, which can be reoriented by electric fields. Relaxor ferroelectrics are a type of ferroelectric where the longrange ordering of dipoles is disrupted by cation disorder, exhibiting complex polar states with a significant amount of local structural heterogeneity at the nanoscale. They are the materials of choice for numerous devices such as capacitors, nonlinear optical devices, and piezoelectric transducers, owing to their extraordinary dielectric, electro-optic, and electromechanical properties. However, despite their extensive applications in these devices, the origins of their unique properties are yet to be fully understood, hindering the design and exploration of new relaxor ferroelectric-based materials. Herein, the complex polar states and applications of relaxor ferroelectrics are first introduced. Attention is then focused on their electromechanical properties, where the relationship between local structural heterogeneity and the extraordinary electromechanical properties is discussed. Based on the understanding of relaxor ferroelectrics, potential strategies to exploit the local structural heterogeneity to design ferroelectrics for drastically enhancing their electromechanical performances are also discussed. It is expected that this article will stimulate future studies on the important roles of local structural heterogeneity in improving the properties of various functional materials. FerroelectricsThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Section: State‐of‐the‐art Relaxor Ferroelectric Materials and Their Amentioning

confidence: 99%

Local Structural Heterogeneity and Electromechanical Responses of Ferroelectrics: Learning from Relaxor Ferroelectrics

Zhang

Damjanović

et al. 2018

Adv Funct Materials

327

228

View full text Add to dashboard Cite

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Unveiling the strain and structural ferroelectric phase transition induced by temperature in lead titanate perovskite modified with 40% of calcium

Galão

Garcia

Estrada

2022

Journal of Applied Physics

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Structurally correlated ferroelectric phase transitions induced by temperature are reported for the solid solution Pb0.6Ca0.4TiO3 compound. Such phase transitions were analyzed by considering different parameters, such as lattice parameters, microstrain, dielectric properties, and thermal analysis. Synchrotron x-ray diffraction and Rietveld refinement studies revealed a tetragonal symmetry from room temperature up to ∼550 K and uniaxial microstrain from room temperature to ∼400 K. The first thermally driven phase transition observed was from displacive ferroelectric tetragonal symmetry to another non-displacive tetragonal symmetry. The next phase transition was from the tetragonal to cubic. The electric permittivity as a function of temperature for frequency from 1 kHz to 1 MHz and the differential scanning calorimetry report features typical of ferroelectric–paraelectric phase transition only around 400 K, and no other abrupt change in properties is observed at 550 K, indicating the sequence of first- and then second-order phase transition.

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A structural evidence of polar clusters in PLZT relaxor ceramics

Cited by 2 publications

References 10 publications

Local Structural Heterogeneity and Electromechanical Responses of Ferroelectrics: Learning from Relaxor Ferroelectrics

Local Structural Heterogeneity and Electromechanical Responses of Ferroelectrics: Learning from Relaxor Ferroelectrics

Unveiling the strain and structural ferroelectric phase transition induced by temperature in lead titanate perovskite modified with 40% of calcium

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