Lattice dynamics and superionic properties of Cd1−xPbxF2 crystals

Kosacki, Igor; Hibner, K.; Litvinchuk, A. P.; Valakh, M. Ya.

doi:10.1016/0038-1098(86)90362-5

Cited by 15 publications

(7 citation statements)

References 10 publications

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“…Due to the decrease in the number of ions taking part in Tzg-type oscillations when the temperature is increased, the integral intensity of the Raman mode in PbF, decreases a t temperatures above T = 400 K (Fig. 5b) [3]. The analogous decrease of intensity for PbF,:6yo LiF crystals is observed a t temperatures as low as 300 K, which is in good agreement with the transport measurements.…”

Section: Resultssupporting

confidence: 83%

“…The results of the measurements [3] of Raman scattering and ionic conductivity in PbF, crystals indicate a correlation between the temperature-activated conduction anomalies and the lattice dynamics of this crystals.…”

Section: Introductionmentioning

confidence: 71%

“…Fig. 3), as is the case for PbF, [3]. The temperature dependence of the line form has been analysed in the following way:…”

Section: Resultsmentioning

confidence: 99%

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Lattice dynamics and ionic conductivity of PbF₂:6%LiF superionic crystals

Kosacki

Hibner

Litvinchuk

et al. 1986

Physica Status Solidi (b)

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Temperature studies of lattice dynamics and ionic conductivity, within the temperature range of 100 to 700 K, are performed for PbF2 and PbF2:6% LiF superionic crystals. The doped crystals exhibit a decreased activation energy of the conductivity. A decrease, by about 70 degrees, in the temperature at which the ionic conductivity changes and Raman spectra anomalies occur is observed. It is found that at temperatures significantly lower than that of the superionic state transition, the Raman line form is determined by processes of phonon scattering at thermally excited defects.

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Section: Resultssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 71%

See 1 more Smart Citation

Lattice dynamics and ionic conductivity of PbF₂:6%LiF superionic crystals

Kosacki

Hibner

Litvinchuk

et al. 1986

Physica Status Solidi (b)

Self Cite

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“…Such linear relationships for the variation of optical phonons with a composition are clear signatures of a one‐mode behavior. This result is similar to the behavior observed in the cases of Cd 1− x Pb x F 2 , Ca 1− x Sr x F 2 , and Sr 1− x Ba x F 2 crystals with fluorite structures, showing a one‐mode behavior of optical phonons …”

supporting

confidence: 86%

Raman Spectroscopic Study of the Optical Phonons of Mg₂Si_1−xSn_x Solid Solutions

Yasseri

Schüpfer

Chen

et al. 2020

Physica Rapid Research Ltrs

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Mg2Si1−xSnx solid solutions are prepared in the composition range from x = 0 to 1 by mechanical alloying using high‐energy ball milling followed by direct‐current sintering at 600–800 °C. X‐ray diffraction analysis confirms that the samples obtained are uniform solid solutions. Raman spectroscopy shows two first‐order phonon Raman bands and a distribution of Raman signals due to second‐order phonon Raman scattering. The first‐order Raman bands are assigned to the nondegenerate Raman‐forbidden F1u (LO) mode and the triply degenerate Raman‐allowed F2g mode. Both modes exhibit a linear shift of the phonon frequency with a composition showing a clear one‐mode behavior for this solid solution. The findings are discussed in the context of existing theories for the occurrence of the one‐mode or two‐mode behavior of phonons in solid solutions.

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“…This strong disordering of the PbF, crystals leads to the appearance of strong latticeanharmonicity effects, which manifest themselves in the Raman scattering [4] and in the temperature dependence of the lattice constant [ 5 , 61. The results obtained by us on the lattice dynamics of mixed Cdl-,Pb,Fz crystals allowed us t o draw the conclusion that the superionic properties of PbF, crystals are connected with small values of the fluorine-lead interaction [7]. This interaction is probably determined by the specific valence electron configuration of Pb atoms (group IV element) in comparison with electron configuration of Cd atoms (group I1 element).…”

Section: Introductionmentioning

confidence: 83%