Abstract In this paper, we report the influence of A-site substitution on dielectric and electrical behavior of Mn3O4 based modified spinels at room temperature. All the three spinels substituted with Mn, Zn and Co at A-site showed slight decrease in relative permittivity (ε′) and dissipation factor (tanδ) in the studied frequency range of 40 Hz to 8 MHz. However, the influence of A-site substitution was noticeable because of it dominant influence on relative permittivity and dissipation factor over pure Mn3O4 spinel. The relative permittivity increased from ∼ 16 to 95 after substitution of Zn in A-site whereas the substitution of Co increased the magnitude upto 40. Similar trend was observed with tan δ measurement after A-site substitution. The frequency dependent impedance measurement revealed the better conducting behavior of pure and modified spinels because of its low impedance range and better frequency dependent ac-conductivity.

中文翻译：

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A位取代对Mn3O4尖晶石介电和阻抗行为的影响

摘要 在本文中，我们报告了室温下 A 位取代对 Mn3O4 基改性尖晶石介电和电学行为的影响。在 40 Hz 至 8 MHz 的研究频率范围内，在 A 位用 Mn、Zn 和 Co 取代的所有三种尖晶石都显示相对介电常数（ε'）和耗散因数（tanδ）略有下降。然而，A 位取代的影响是显着的，因为它对纯 Mn3O4 尖晶石的相对介电常数和耗散因数有显着影响。在 A 位取代 Zn 后，相对介电常数从约 16 增加到 95，而被 Co 取代的幅度增加到 40。在 A 位取代后，tan δ 测量观察到类似的趋势。