TEMPERATURE-DEPENDENCE OF LINE-WIDTH OF SO42- MODES IN THE RAMAN-SPECTRA OF AMMONIUM-SULFATE

被引：7

作者：

BAJPAI, PK ^{[1
]}

JAIN, YS ^{[1
]}

BIST, HD ^{[1
]}

机构：

[1] INDIAN INST TECHNOL,DEPT PHYS,KANPUR 208016,UTTAR PRADESH,INDIA

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 1990年 / 21卷 / 06期

关键词：

D O I：

10.1002/jrs.1250210602

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The temperature dependence of the Raman line width of the ν1 and ν2 modes of the SO 42− ion in ammonium sulphate was investigated. A sudden change in the full width at half maximum intensity (FWHM) of both bands is observed at the ferroelectric transition point of the crystal. The results are explained in terms of the coupling between phonons originating from these modes and NH4+ ion pseudo‐spins. The results obtained from pseudospin–phonon coupling formulations agree satisfactorily with the experimental results. The coupling also accounts for the temperature dependence of spontaneous polarization. Copyright © 1990 John Wiley & Sons, Ltd.

引用

页码：327 / 332

页数：6

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