{"title":"Inelastic light scattering study of fast relaxation in dibutyl phthalate glass","authors":"S.V. Adichtchev , M.Yu. Ivanov , N.V. Surovtsev","doi":"10.1016/j.jnoncrysol.2024.123180","DOIUrl":null,"url":null,"abstract":"<div><p>The organic glass-forming dibutyl phthalate (DBP) has been studied applying low-frequency Raman and Brillouin spectroscopy in the temperature range from 90 K to 200 K, covering glassy and liquid states. Spectra of fast relaxation in the GHz-THz frequency range were determined from the inelastic light scattering spectra. The line width and position of the Brillouin peak were used to determine the <em>Q<sup>-1</sup></em>-factor, which is inversely proportional to susceptibility at the Brillouin peak frequency. It was discovered that the temperature evolution of the fast relaxation susceptibility and the <em>Q<sup>-1</sup></em>-factor agree well with a mobility parameter from pulse EPR experiment. The findings show that peculiarities in the temperature dependence the EPR data found early for DBP have are accompanied by a redistribution of the relaxation times.</p></div>","PeriodicalId":16461,"journal":{"name":"Journal of Non-crystalline Solids","volume":"644 ","pages":"Article 123180"},"PeriodicalIF":3.2000,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Non-crystalline Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022309324003570","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
The organic glass-forming dibutyl phthalate (DBP) has been studied applying low-frequency Raman and Brillouin spectroscopy in the temperature range from 90 K to 200 K, covering glassy and liquid states. Spectra of fast relaxation in the GHz-THz frequency range were determined from the inelastic light scattering spectra. The line width and position of the Brillouin peak were used to determine the Q-1-factor, which is inversely proportional to susceptibility at the Brillouin peak frequency. It was discovered that the temperature evolution of the fast relaxation susceptibility and the Q-1-factor agree well with a mobility parameter from pulse EPR experiment. The findings show that peculiarities in the temperature dependence the EPR data found early for DBP have are accompanied by a redistribution of the relaxation times.
期刊介绍：
The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid.
In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.
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