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首页> 外文期刊>Materials Science and Engineering >Structural, dielectric, electrical and modulus spectroscopic characteristics of CoFeCuO_4 spinel ferrite nanoparticles
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Structural, dielectric, electrical and modulus spectroscopic characteristics of CoFeCuO_4 spinel ferrite nanoparticles

机译：COFECUO_4尖晶石铁氧体纳米粒子的结构，电介质，电气和模量谱特性

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摘要

In this work, our focus is upon the synthesis of material having useful and less expensive high frequency applications. For this purpose, we used the sol-gel method to elaborate the Cu-substituted CoFe_2O_4. The XRD analysis confirmed the single-phase cubic spinel structure with the Fd3m space group. The grain size distribution was traced through different methods. It confirms the nano-metric size of the compound. To elaborate the electrical and dielectric properties of the prepared sample, impedance spectroscopy was invested. It demonstrated the relaxing nature of our material and indicated that the substitution of Fe by Cu on CoFe_2O_4 increases the ac conductivity and decreases the dielectric loss especially at higher frequencies; the low loss values indicate the potential of these ferrites for high frequency applications at temperatures close to the room temperature. The activation energy value was estimated based on the relaxation time and the conductance curves analysis, the found value is around 0.33 eV which confirms the semiconductor character of our compound and its capacity to achieve a significant gain in productivity. Moreover, this obtained value indicates the relationship between the electrical conductivity mechanism and the relaxation one.
机译：在这项工作中，我们的重点是合成具有有用且较便宜的高频应用的材料。为此目的，我们使用溶胶 - 凝胶法阐明Cu-取代的CoFe_2O_4。 XRD分析证实了具有FD3M空间组的单相立方尖晶石结构。通过不同的方法跟踪晶粒尺寸分布。它证实了化合物的纳米度量大小。为了详细说明制备样品的电气和介电性能，投入阻抗光谱。它展示了我们材料的放松性质，并表明Cu在CoFe_2O_4上取代Fe通过电导率提高了AC电导率，并降低了特别是在较高频率下的介电损耗;低损耗值表示这些铁氧体在接近室温的温度下为高频应用的电位。基于弛豫时间和电导曲线分析估计激活能量值，发现的值约为0.33eV，证实了我们化合物的半导体特性及其在生产率的显着增益的能力。此外，该获得的值表示电导率机制与松弛之间的关系。

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  • 来源
    《Materials Science and Engineering》 |2021年第10期|115331.1-115331.10|共10页
  • 作者

    M. Nasri; C. Henchiri; R. Dhahri; J. Khelifi; H. Rahmouni; E. Dhahri; L.H. Omari; A. Tozri; Mohamed R. Berber;

  • 作者单位

    Laboratoire de Physique Appliquee Faculte des Sciences Universite de Sfax B.P. 1171 3000 Sfax Tunisia;

    Laboratoire de Physique Appliquee Faculte des Sciences Universite de Sfax B.P. 1171 3000 Sfax Tunisia;

    Laboratoire de Physique Appliquee Faculte des Sciences Universite de Sfax B.P. 1171 3000 Sfax Tunisia;

    Unite de recherche devaluation et d'optimisation des ressources Faculte des sciences et de la technologie de Sidi Bouzid Universite de Kairouan 9100 Sidi Bouzid Tunisia;

    Unite de recherche Materiaux Avances et Nanotechnologies Institut Superieur des Sciences Appliquees et deTechnologie de Kasserine Universite de Kairouan Kasserine Tunisia;

    Laboratoire de Physique Appliquee Faculte des Sciences Universite de Sfax B.P. 1171 3000 Sfax Tunisia;

    LPMMAT Faculty of Sciences Ain-Chock University of Hassan Ⅱ Casablanca Morocco;

    Physics Department College of Science Jouf University Sakaka 2014 Saudi Arabia;

    Chemistry Department College of Science Jouf University Sakaka 2014 Saudi Arabia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Spinel ferrite; Impedance spectroscopy; Activation energy; Phenomenon of relaxation; ac Electrical conductivity;

    机译：尖晶石铁氧体;阻抗光谱;活化能;放松的现象;交流电导率;

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