期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 125, 期 33, 页码 18259-18269出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.1c04250
关键词
-
资金
- Council of Scientific and Industrial Research (CSIR) [19/06/2016(i)EU-V, 18/06/2017(i)EU-V, 1448| (CSIR-UGC NET DEC. 2017]
- University Grants Commission (UGC) [19/06/2016(i)EU-V, 18/06/2017(i)EU-V, 1448| (CSIR-UGC NET DEC. 2017]
The evolution of vibrational properties of nanocrystalline cubic-phase thulium sesquioxide using Raman scattering was investigated in the temperature range of 80-440 K, revealing a red shift in phonon modes with increasing temperature. Anharmonic parameters were estimated and the dominance of explicit anharmonicity over implicit anharmonicity was observed, determined by the line width of the peak with varying temperature.
The temperature-dependent evolution of the vibrational properties of nanocrystalline cubic-phase thulium sesquioxide (Tm2O3) using Raman scattering is investigated in the 80-440 K temperature range. The phonon modes in the Raman spectra of the sample were found to exhibit a red shift with increase in the sample temperature. The most prominent F-g + A(g) mode was observed at 383 cm(-1); however, its line shape was found to be asymmetric in nature. Briet-Wigner-Fano (BWF) line shape was used to derive the vibrational characteristics of this mode. Further, the coupling coefficient, i.e., 1/q, was estimated, and the anharmonic parameters for the sample were also calculated in the given temperature range up to 440 K. The temperature dependency of the phonon frequency revealed three to six times greater magnitude of explicit anharmonicity as compared to that of implicit anharmonicity, with the dominance of the three-phonon process as determined by the line width of the peak with varying temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据