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Electrical conductivity and dielectric relaxation of bulk iron (III) chloride tetraphenylporphyrin

机译:大块氯化铁四苯基卟啉的电导率和介电弛豫

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摘要

The electrical conductivity and dielectric properties of bulk iron (Ⅲ) chloride tetraphenylporphyrin, FeTP-PC1, has been investigated in the frequency range from 40 Hz to 5 MHz and in the temperature range of 298-373 K. The frequency dependence of σ(ω, T) follows the Jonscher's universal dynamic law. The temperature behaviour of the frequency exponents shows that the correlated barrier hopping (CBH) model is well adapted to FeTPPCl semiconductor material. The conductivity in the direct regime, σ_(dc), is described by the variable range hopping (VRH). In spite of the absence of the dielectric loss peaks, application of the dielectric modulus formulism gives a simple method for evaluating the activation energy of the dielectric relaxation.
机译:在40 Hz至5 MHz的频率范围内和298-373 K的温度范围内研究了块状氯化铁四苯基卟啉FeTP-PC1的电导率和介电性能。σ(ω)的频率依赖性,T)遵循Jonscher的普遍动力定律。频率指数的温度行为表明,相关势垒跳跃(CBH)模型非常适合FeTPPC1半导体材料。在直接状态下的电导率σ_(dc)由可变范围跳变(VRH)描述。尽管没有介电损耗峰,但介电模量公式的应用提供了一种简单的方法来评估介电弛豫的活化能。

著录项

  • 来源
    《Materials Chemistry and Physics》 |2012年第3期|649-654|共6页
  • 作者单位

    Physics Department, Faculty of Education, Ain Shams University, Roxy 71757, Cairo, Egypt;

    Physics Department, Faculty of Education, Ain Shams University, Roxy 71757, Cairo, Egypt;

    Physics Department, Faculty of Education, Ain Shams University, Roxy 71757, Cairo, Egypt,Taif University, Faculty of Science, Physics Department, Saudi Arabia;

    Physics Department, Faculty of Education, Ain Shams University, Roxy 71757, Cairo, Egypt;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ac conductivity; dielectric relaxation; FeTPPCl;

    机译:交流电导率介电弛豫磷酸铁;
  • 入库时间 2022-08-18 00:39:39

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