From crystallographically prominent to arbitrary phase boundary orientation

Dec, J.; Roleder, Krystian; Stróż, Kazimierz

doi:10.1016/0038-1098(96)00214-1

Cited by 9 publications

(8 citation statements)

References 8 publications

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“…The exact composition of the starting melt was taken after Ref. as 2.4 mol% of PbZrO 3 :Nb 5+ (1 at. %), 77 mol% of PbO (re‐counted to Pb 3 O 4 ) and 20.6 mol% of B 2 O 3 (140 g in total).…”

Section: Methodsmentioning

confidence: 99%

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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: Methodsmentioning

confidence: 99%

“…The exact composition of the starting melt was taken after Ref. 27 . The use of Pb 3 O 4 caused a distinct improvement of the quality of growing PZO:Nb single crystals.…”

Section: Methodsmentioning

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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“…The composition of the melt used in our experiments was the same as in Ref. 16 devoted to crystallization of PbZrO3, namely 2.4 mol% of PbHfO3, 77 mol% of PbO (re-counted to Pb3O4) and 20.6 mol% of B2O3. Pb3O4 was used instead of PbO to avoid coloration of the as-grown crystals caused by oxygen deficiency.…”

Section: Methodsmentioning

confidence: 99%

Elastic anomalies associated with the antiferroelectric phase transitions of PbHfO3 single crystals

Roleder

Majchrowski

et al. 2014

Journal of the Korean Physical Society

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The temperature dependence of the elastic properties of antiferroelectric PbHfO3 was investigated by Brillouin scattering. The two structural phase transitions of antiferroelectric-antiferroelectricparaelectric phases were clearly identified by discontinuous changes in the acoustic mode frequencies and the hypersonic damping. The substantial softening of the mode frequency along with the remarkable increase in the acoustic damping observed in the paraelectric phase indicated the formation of precursor noncentrosymmetric (polar) clusters and their coupling to the acoustic waves. This was corroborated by the observation of quasi-elastic central peaks, the intensity of which grew upon cooling toward the Curie point. The obtained relaxation time exhibited a slowing-down behavior, suggesting that the dynamics of precursor clusters becomes more sluggish on approaching the phase transition temperature. 2PACS numbers: 78.35.+c, 62.50.+p

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“…A large thermal hysteresis and coexistence of R3m, R3c and P bam phases result from dielectric and pyroelectric measurements on PZT with x (Ti) = 0.05 25 and with Raman scattering in Nb-doped PZT with x ≤ 0.03, 26 while TEM observations 27,28 provide additional information on the local octahedral tilting, and are consistent with the idea that the R3m phase at low x is already tilted, though with a disordered or incommensurate pattern. The nucleation of the AFE phase has been followed also directly with a polarized microscope, 29 finding that its athermal character in pure PbZrO 3 , namely independent of thermal fluctuations and hence unchanged under stationary conditions, is changed by the Ti substitution into strongly isothermal, where the evolution can slowly proceed at constant temperature. 29 Codoping with La and Li on the Pb site adds new possible mechanisms of aging on longer time scales, related to the cation distribution, and the resulting changes at the atomic level have been followed through the evolution of the profiles of the x-ray diffraction peaks.…”

Section: Tcmentioning

confidence: 99%

Effects of aging and annealing on the polar and antiferrodistortive components of the antiferroelectric transition in PZT

Cordero,

Trequattrini,

Craciun

et al. 2014

Preprint

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From crystallographically prominent to arbitrary phase boundary orientation

Cited by 9 publications

References 8 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

Elastic anomalies associated with the antiferroelectric phase transitions of PbHfO3 single crystals

Effects of aging and annealing on the polar and antiferrodistortive components of the antiferroelectric transition in PZT

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From crystallographically prominent to arbitrary phase boundary orientation

Cited by 9 publications

References 8 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

Elastic anomalies associated with the antiferroelectric phase transitions of PbHfO3 single crystals

Effects of aging and annealing on the polar and antiferrodistortive components of the antiferroelectric transition in PZT

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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