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作为频率和温度函数的ZnNiFeO尖晶石铁氧体的电导率和巨介电常数研究。

Conductivity and giant permittivity study of ZnNiFeO spinel ferrite as a function of frequency and temperature.

作者信息

Hajlaoui Mohsen Elain, Dhahri Radhia, Hnainia Nessrine, Benchaabane Aida, Dhahri Essebti, Khirouni Kamel

机构信息

Laboratoire Physique Appliquée, Faculté des Sciences, Université de Sfax B. P. 1171 Sfax 3000 Tunisia

Laboratoire des Nanomatériaux et de Systèmes pour les Energies Renouvelables Centre de Recherches et des Technologies de l'Energie, Technopole Borj Cedria BP 095 Hammam Lif Tunisia.

出版信息

RSC Adv. 2019 Oct 10;9(56):32395-32402. doi: 10.1039/c9ra06589j.

DOI:10.1039/c9ra06589j
PMID:35529708
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9072979/
Abstract

NiZnFeO was prepared by the solid state reaction route at different temperatures. The dielectric properties of spinel ferrites were investigated in the frequency range 50 Hz-10 MHz and in the temperature range 300-420 K. Conductance is shown to increase with increasing frequency and temperature. Impedance analyses indicated that the relaxation phenomenon is strongly dependent on temperature and frequency. The impedance plots displayed both intra- and inter-granular contributions. Electrical equivalent circuit was proposed to explain the impedance results. The decrease of giant permittivity values with the increase in frequency proves the dispersion in the low frequency range and is showing the Maxwell-Wagner interfacial polarization.

摘要

通过固态反应路线在不同温度下制备了镍锌铁氧体。在50Hz - 10MHz的频率范围和300 - 420K的温度范围内研究了尖晶石铁氧体的介电性能。结果表明，电导率随频率和温度的升高而增加。阻抗分析表明，弛豫现象强烈依赖于温度和频率。阻抗图显示了晶内和晶间的贡献。提出了等效电路来解释阻抗结果。巨介电常数随频率增加而降低，这证明了在低频范围内的色散，并表明了麦克斯韦-瓦格纳界面极化。

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