Phase transitions in PbZr0.72Sn0.28O3 single crystals studied by Raman spectroscopy

Jankowska‐Sumara, Irena; Jeong, Minseok; Ko, Jae‐Hyeon; Majchrowski, A.; Żmija, Józef

doi:10.1080/01411594.2016.1178743

Cited by 13 publications

(13 citation statements)

References 21 publications

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“…In the spectra of the PE phase, features of the first‐order Raman scattering are observed, which are forbidden in the centrosymmetric structure . This implies that the symmetry of the crystal is not cubic.…”

Section: Resultsmentioning

confidence: 99%

Influence of Nb⁵⁺ ions on phase transitions and polar disorder above T_C in PbZrO₃ studied by Raman spectroscopy

Kajewski

Jankowska‐Sumara

et al. 2020

J Am Ceram Soc

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Micro‐Raman light scattering experiments on PbZrO3 (PZO) single crystal doped with Nb5+ have been investigated. Special attention was paid to the paraelectric (PE) phase in which nominally forbidden first‐order Raman spectra were detected at temperatures far above the phase transition TC. Complex Raman spectra were observed in the vicinity of three structural phase transitions. These results mainly from the coexistence of phases with different symmetries in a wide temperature range below TC. The Raman measurements have been compared with dielectric and optical observations and proved that polar nanoregions in a centrosymmetric lattice appear well above TC. It was shown that doping ABO3 perovskites with heterovalent ions like Nb5+ unbalances charge neutrality of the lattice and strongly extends the temperature range of polar regions. The investigations performed point out that in the PE matrix the interaction between electrons and lattice vibrations, as recently suggested for pure PZO, plays an important role.

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Section: Resultsmentioning

confidence: 99%

Influence of Nb⁵⁺ ions on phase transitions and polar disorder above T_C in PbZrO₃ studied by Raman spectroscopy

Kajewski

Jankowska‐Sumara

et al. 2020

J Am Ceram Soc

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“…On the other hand, in Ref. a doubt was expressed, whether Tϵ max is related to the structural phase transition, since no clear anomaly of specific heat was observed in the area of maximum value of dielectric permittivity (see Fig. ).…”

Section: Resultsmentioning

confidence: 99%

“…However, the main interest concerned the phase transition at the T C . Two optic soft modes of different nature were found in paraelectric phase of a PZS‐28 . One of them was found to be coupled to the elastic anomalies (LA mode) and stemmed from elastic precursors, whereas the second mode originated from the polar nanoregions of ferroelectric properties as an effect of locally broken cubic symmetry (transversal‐optic, TO, mode).…”

Section: Introductionmentioning

confidence: 99%

“…Since the lattice dynamics is involved in the temperature dependence of some parameters of Mössbauer spectra, it becomes possible to use them in order to get some information about the lattice dynamics of antiferroelectric PZS‐ x passing through its critical points. The primary objective of the studies was to relate the soft phonons behavior observed in all phase transitions in PZS single crystals by either Raman and Brillouin spectroscopy with the anomalies in the Mössbauer effect that should occur in accordance with the Dvorak's theory. Thus the presented paper deals with Mössbauer effect studies in single crystals of PZS‐ x, mainly because of Mössbauer nuclei (Sn) implemented to the crystal lattice.…”

Section: Introductionmentioning

confidence: 99%

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Pecularities of antiferroelectric phase transitions in PbZr_0.71 Sn_0.29 O₃ crystal investigated by Mössbauer effect

Podgórna

Żukrowski

Jankowska‐Sumara

et al. 2017

Phys. Status Solidi B

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The Mössbauer spectra of 119Sn in PbZr1−xSnxO3 compound were studied from 30 to 300 °C with particular emphasis on the regions of phase transitions. Some changes of the Mössbauer spectrum near the phase transition temperatures were observed, as expected from the change in the crystal structure. The measurements also showed that the Mössbauer fraction considerably drops near the temperature of the phase displacive transition between two antiferroelectric phases (AFE1–AFE2), whereas this drop is considerably smaller at Curie point. Little difference was found in the center shift of the spectrum, indicating that the bonding character is not affected by the phase transitions. The obtained results were interpreted according to Dvorak's suggestion that in antiferroelectrics the frequency over the entire optical branch may soften at particular phase transitions. According to the theory, the mode softening should manifest as a decrease in the Mössbauer–Lamb recoil‐free fraction (f‐factor) due to the increasing vibrational amplitude of the soft mode. Such softening was already observed in Raman scattering measurements in the PbZr1−xSnxO3 single crystals.

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“…Despite many years of research on lead‐free materials, lead‐based AFE perovskites are still leading research area due to their fascinating properties: excellent pyroelectric, piezoelectric and ferroelectric properties . Studies on AFE energy storage ceramics have been focused on PZT‐based ceramics modified by La 3+ , Ba 2+ , Sn 2+ , Y 3+ , Eu 3+ , etc .…”

Section: Introductionmentioning

confidence: 99%

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

Zhang

Zhu

et al. 2018

J Am Ceram Soc

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Energy storage capacitors with high recoverable energy density and efficiency are greatly desired in pulse power system. In this study, the energy density and efficiency were enhanced in Mn‐modified (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3 antiferroelectric ceramics via a conventional solid‐state reaction process. The improvement was attributed to the change in the antiferroelectric‐to‐ferroelectric phase transition electric field (EF) and the ferroelectric‐to‐antiferroelectric phase transition electric field (EA) with a small Mn addition. Mn ions as acceptors, which gave rise to the structure variation, significantly influenced the microstructures, dielectric properties and energy storage performance of the antiferroelectric ceramics. A maximum recoverable energy density of 2.64 J/cm3 with an efficiency of 73% was achieved when x = 0.005, which was 40% higher than that (1.84 J/cm3, 68%) of the pure ceramic counterparts. The results demonstrate that the acceptor modification is an effective way to improve the energy storage density and efficiency of antiferroelectric ceramics by inducing a structure variation and the (Pb0.93Ba0.04La0.02)(Zr0.65Sn0.3Ti0.05)O3‐xMn2O3 antiferroelectric ceramics are a promising energy storage material with high‐power density.

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Phase transitions in PbZr_0.72Sn_0.28O₃ single crystals studied by Raman spectroscopy

Cited by 13 publications

References 21 publications

Influence of Nb⁵⁺ ions on phase transitions and polar disorder above T_C in PbZrO₃ studied by Raman spectroscopy

Influence of Nb⁵⁺ ions on phase transitions and polar disorder above T_C in PbZrO₃ studied by Raman spectroscopy

Pecularities of antiferroelectric phase transitions in PbZr_0.71 Sn_0.29 O₃ crystal investigated by Mössbauer effect

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

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Phase transitions in PbZr0.72Sn0.28O3 single crystals studied by Raman spectroscopy

Cited by 13 publications

References 21 publications

Influence of Nb5+ ions on phase transitions and polar disorder above TC in PbZrO3 studied by Raman spectroscopy

Influence of Nb5+ ions on phase transitions and polar disorder above TC in PbZrO3 studied by Raman spectroscopy

Pecularities of antiferroelectric phase transitions in PbZr0.71 Sn0.29 O3 crystal investigated by Mössbauer effect

Structure variation and energy storage properties of acceptor‐modified PBLZST antiferroelectric ceramics

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Phase transitions in PbZr_0.72Sn_0.28O₃ single crystals studied by Raman spectroscopy

Influence of Nb⁵⁺ ions on phase transitions and polar disorder above T_C in PbZrO₃ studied by Raman spectroscopy

Influence of Nb⁵⁺ ions on phase transitions and polar disorder above T_C in PbZrO₃ studied by Raman spectroscopy

Pecularities of antiferroelectric phase transitions in PbZr_0.71 Sn_0.29 O₃ crystal investigated by Mössbauer effect