Conductivity spectra and comparative scaling studies of polycrystalline PbSnF4
Conductivity spectra and comparative scaling studies of polycrystalline PbSnF4
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DOI：
10.1016/j.ssi.2003.09.002
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发表时间：
2004-02-27
影响因子：
3.2
通讯作者：
Okuda, T
中科院分区：
文献类型：
--
作者：
Ahmad, MM;Yamada, K;Okuda, T
研究了多晶PbSnF_4材料在42 Hz-5 MHz频率范围内不同温度下的电导谱。电导率数据进行了分析，使用杏仁-西方形式主义。通过对交流电导率数据的分析，得到了样品的直流电导率、载流子的跳跃频率以及它们各自的激活能。载流子浓度的估计值被发现是温度无关的，并在良好的协议从结构确定的值。我们已经应用了不同的缩放方法的电导率和介电常数谱的比较研究。应用标度律成功地崩溃的电导率和介电常数谱成单一的曲线，表明温度无关的弛豫机制。此外，还根据Sidebottom提出的关系式计算了介电常数强度Δ ε，并与实验值进行了比较。(C)2003 Elsevier B. V.保留所有权利。
The conductivity spectra of polycrystalline PbSnF4 material have been investigated in the frequency range 42 Hz-5 MHz at different temperatures. The conductivity data have been analyzed using Almond-West formalism. The DC conductivity, the hopping frequency of the charge carriers, and their respective activation energies have been obtained from the analysis of the AC conductivity data. The estimated values of the charge carriers concentration are found to be temperature independent and in good agreement with the value determined from the structure. We have applied different scaling approaches of the conductivity and permittivity spectra in a comparative study. The applied scaling laws successfully collapse the conductivity and permittivity spectra into single curves, indicating temperature-independent relaxation mechanism. Moreover, The values of the permittivity strength Deltaepsilon have been calculated from the relation proposed by Sidebottom and are found to be in reasonable agreement with experimental values. (C) 2003 Elsevier B.V. All rights reserved.