Phase transition and anisotropic conductivity in guanidine zinc sulfate crystals

被引：9

作者：

Czapla, Z. ^{[2
,3
]}

Komar, J. ^{[1
]}

Marciniszyn, T. ^{[1
]}

Poprawski, R. ^{[1
]}

机构：

[1] Wroclaw Univ Technol, Inst Phys, PL-50370 Wroclaw, Poland

[2] Opole Univ Technol, Dept Phys, PL-45271 Opole, Poland

[3] Univ Wroclaw, Inst Expt Phys, PL-50204 Wroclaw, Poland

来源：

SOLID STATE IONICS | 2011年 / 196卷 / 01期

关键词：

Guanidine zinc sulfate; Superprotonic conductors; Phase transition; Ionic conductivity; Specific heat; Dielectric relaxation; M-II; RELAXATION; CD; FE; CO;

D O I：

10.1016/j.ssi.2011.05.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The guanidine zinc sulfate [C(NH2)(3)](2)Zn(SO4)(2) - abbreviated as GZS - crystal was grown and characterized by the calorimetric and dielectric investigations. Basing on the specific heat measurements the second order structural phase transition at temperature of about 178 K was found. The anisotropic ionic conductivity of GZS was observed in the complex dielectric measurements performed in wide temperature and frequency ranges: 140-320 K and 10(0)-10(6) Hz, respectively. The activation energy of the conduction process measured along [110] direction varies from 0.43 eV in low temperature to 0.28 eV in high temperature phase. The activation energy in the [001] direction in the high temperature phase equals to 0.43 eV. The low frequency dielectric relaxation process of activation type in GZS crystals was found. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：25 / 29

页数：5

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