Dutta D, Ghosh A
Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700 032, India.
J Chem Phys. 2008 Jan 28;128(4):044511. doi: 10.1063/1.2828495.
Ion dynamics and structure of a series of superionic AgI-doped silver tellurite glasses have been investigated in this paper. The composition dependence of the dc conductivity and the activation energy of these glasses has been compared with those of AgI-doped silver phosphate and borate glasses. We have observed that the conductivity increases and the activation energy decreases with increase of AgI content and that the tellurite glasses have higher conductivity than those for phosphate or borate glasses. We have analyzed the ac electrical data in the framework of the power law and the electric modulus formalisms. We have established a correlation between the crossover rate of the mobile silver ions and the rearrangement of the structural units in tellurite glasses. The scaling of the conductivity spectra has been used to interpret the temperature and composition dependence of the relaxation dynamics. Analysis of the dielectric relaxation in the framework of modulus formalism indicates an increase in the ion-ion cooperation in the glass compositions with increasing AgI content.
本文研究了一系列掺杂超离子碘化银的亚碲酸银玻璃的离子动力学和结构。将这些玻璃的直流电导率和活化能的成分依赖性与掺杂碘化银的磷酸银和硼酸银玻璃进行了比较。我们观察到，随着碘化银含量的增加，电导率增加而活化能降低，并且亚碲酸盐玻璃比磷酸盐或硼酸盐玻璃具有更高的电导率。我们在幂律和电模量形式体系的框架内分析了交流电数据。我们建立了亚碲酸盐玻璃中移动银离子的交叉速率与结构单元重排之间的相关性。电导率谱的标度已被用于解释弛豫动力学的温度和成分依赖性。在模量形式体系框架内对介电弛豫的分析表明，随着碘化银含量的增加，玻璃成分中的离子-离子协同作用增强。
