Dielectric and electric studies of the [N(CH3)4][N(C2H5)4]ZnCl4 compound at low temperature |
| |
| Authors: | K. Karoui A. Ben Rhaiem F. Hlel M. Arous K. Guidara |
| |
| Affiliation: | 1. Laboratoire de, L’Etat Solide, University of Sfax-TUNISIA, Faculty of sciences, Tunisia;2. Laboratoire des Matériaux Composites, Céramiques et Polymères, University of Sfax-TUNISIA, Faculty of sciences, Tunisia |
| |
| Abstract: | The [N(CH3)4][N(C2H5)4]ZnCl4 compound was prepared and characterized by electrical technique. The temperature dependence of the dielectric permittivity shows that this compound is ferroelectric below T = 268 K. The two semi-circles observed in the complex impedance identify the presence of the grain interior and grain boundary contributions to the electrical response in the material. The equivalent circuit is modeled by a combination series of two parallel RP–CPE circuits. The frequency dependent conductivity is interpreted in term of Jonscher's law. The modulus plots can be characterized by the empirical Kohlrausch–Williams–Watts (K.W.W.) function: ?(t) = exp [(−t/τ)β]. The temperature dependence of the alternative current conductivity (σp), direct current conductivity (σdc) and the relaxation frequency (fp) confirm the presence of the ferroelectric–paraelectric phase transition. |
| |
| Keywords: | [N(CH3)4][N(C2H5)4]ZnCl4: ferroelectric Equivalent circuit Modulus complex conductivity |
| 本文献已被 ScienceDirect 等数据库收录！ |
