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V. I. MIKLA1,* , V. V. MIKLA1
Experiments described in this paper have shown that Raman technique is a particularly sensitive method to determine the presence of microcrystal’s in the glassy matrix. Room-temperature polarized Raman scattering spectra of model glass have been collected. Low-frequency peaks were observed in the spectra. A model is proposed for explanation of their appearance. It is shown clearly that the low-frequency Raman spectra allow determining the conditions at the boundaries, sizes as well as concentration of micro-heterogeneities in non-crystalline materials. It was established earlier that for all amorphous (glassy) materials a low-frequency peak, observed in the corresponding spectral region of Raman scattering and called boson peak, is inherent. This peak is absent in crystals of the same chemical composition and is associated with space correlations on the scale of medium-range order Rc≈10Å. On the contrary, less known is that a boson peak can give important information about the presence of microcrystalline inclusions and heterogeneities in the low-frequency Raman spectra of glasses irrespective to their chemical composition..
Microcrystal’s, Glasses, Raman spectra.
V. I. MIKLA, V. V. MIKLA, Finite size microcrystal’s in glasses, Optoelectronics and Advanced Materials - Rapid Communications, 5, 10, October 2011, pp.1078-1080 (2011).
Submitted at: Aug. 18, 2011
Accepted at: Oct. 20, 2011
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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