Raman scattering study of Rb3D(SeO4)2 single crystal in high temperature phases

Raman scattering from the deuterated compound Rb3D(SeO4)2 single crystal is studied in the temperature range between 79.2 K and 480.0 K. A new Raman line appears at 827 cm-1 as much as 60 K below the superionic phase transition temperature, and does not depend on temperature and deuteration. It has...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2001, Vol.70 (1), p.155-158
Main Author: MATSUMOTO, Yoshiyuki
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Diffusion in solids
Exact sciences and technology
Physics
Self-diffusion and ionic conduction in nonmetals
Transport properties of condensed matter (nonelectronic)
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Summary:Raman scattering from the deuterated compound Rb3D(SeO4)2 single crystal is studied in the temperature range between 79.2 K and 480.0 K. A new Raman line appears at 827 cm-1 as much as 60 K below the superionic phase transition temperature, and does not depend on temperature and deuteration. It has been suggested that this line is caused by the stretching motion of a single Se-O in SeO4 tetrahedra accompanied by the destruction and reconstruction of a hydrogen bond. In low temperature region, the dielectric constant of Rb3D(SeO4)2, measured at 100 KHz, shows a λ-type anomaly at 93 K, while the observed Raman spectra are almost the same above and below this temperature.
ISSN:0031-9015
1347-4073
DOI:10.1143/JPSJ.70.155