Инд. авторы:	Osipov A.A., Osipova L.M.
Заглавие:	Low frequency Raman scattering in the BaO-B2O3 glasses: The effect of temperature
Библ. ссылка:	Osipov A.A., Osipova L.M. Low frequency Raman scattering in the BaO-B2O3 glasses: The effect of temperature // European Journal of Glass Science and Techology. Part B: Physics and Chemistry of Glasses. - 2015. - Vol.56. - Iss. 2. - P.53-58. - ISSN 1753-3562.
Внешние системы:	SCOPUS: 2-s2.0-84944097167;
Реферат:	eng: The low frequency Raman spectra of a series of barium borate glasses (with 20, 25, 30 and 35 mol% BaO) were measured and analysed from room temperature to 500°C. There are two contributions to the low frequency Raman spectra: vibrations (boson peak and low lying vibrational modes) and relaxations (quasi-elastic scatering (QES)). It was found that increasing the BaO content leads to a small shift of the boson peak to higher frequency. An increase in the temperature does not lead to significant changes in the shape of the low frequency envelope or to a change of the boson peak frequency. Nevertheless, an increase in the temperature leads to a growth in the intensity of the low frequency minimum below the boson peak (ω<ωBP). This indicates an increase of the QES contribution to the low frequency spectra. The increase in the QES contribution depends on the glass composition, and increases with increasing BaO content.
Ключевые слова:	Vibrational modes; Low-frequency spectra; Low-frequency Raman scattering; Low-frequency Raman; Higher frequencies; Glass; Effect of temperature; Barium borate; Raman scattering; Bosons; Barium compounds; Glass compositions;
Издано:	2015
Физ. характеристика:	с.53-58