Raman studies of phase transitions in ferroelectric [C2H5NH3]2ZnCl4

被引：7

作者：

Ben Mohamed, C. ^{[1
]}

Karoui, K. ^{[1
]}

Bulou, A. ^{[2
]}

Ben Rhaiem, A. ^{[1
]}

机构：

[1] Fac Sci Sfax, Lab Etat Solide, Sfax 3000, Tunisia

[2] Univ Maine, LUNAM Univ, CNRS UMR 6283, IMMM, Ave Olivier Messiaen, F-72085 Le Mans 09, France

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2017年 / 87卷

关键词：

Hybrid material; Differential scanning calorimetric (DSC); Raman spectroscopy and dielectric constant; ELECTRICAL-PROPERTIES; ORDER-DISORDER; TEMPERATURE; COMPLEXES; COMPOUND; SULFATE;

D O I：

10.1016/j.physe.2016.11.008

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present paper accounted for the synthesis, differential scanning calorimetric and vibrational spectroscopy of [C2H5NH3](2)ZnCl(4)grown at room temperature. Differential scanning calorimetric (DSC) disclosed five phase transitions at T-1=231 K, T-2=234 K, T-3=237 K, T-4=247 K and T-5=312 K. The temperature dependence of the dielectric constant at different temperatures proved that this compound is ferroelectric below 238 K. Raman spectra as function temperature have been used to characterize these transitions and their nature, which indicates a change of the some peak near the transitions phase. The analysis of the wavenumber and the line width based on the order-disorder model allowed to obtain information relative to the thermal coefficient and the activation energy near the transitions phase.

引用

页码：141 / 149

页数：9

共 57 条

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