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Investigation of temperature dependent electrical and impedance characteristics of bulk Zn0.95Co0.05O

  • Original Paper: Sol-gel and hybrid materials for dielectric, electronic, magnetic and ferroelectric applications
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Abstract

Zn0.95Co0.05O was synthesized by sol-gel method and then Zn0.95Co0.05O pellet was prepared to investigate its structural, morphological, electrical, and impedance properties. For this purpose, the pellet was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and impedance measurement techniques. SEM images showed that the particle sizes of Zn0.95Co0.05O were between 1 and 100 μm. The frequency and temperature dependence of capacitance, conductance, and complex impedance characteristics of Zn0.95Co0.05O in a pellet form were investigated within the temperature range of 300–500 K and frequency range of 1 kHz–1.5 MHz. The radii of the semicircular arc reduced with increasing temperature revealing that the Zn0.95Co0.05O shows negative temperature coefficient of resistance as in semiconductors. The impedance analysis revealed the contribution of grains and grain boundaries to the conduction and polarization processes.

Highlights

  • Zn0.95Co0.05O was synthesized by sol-gel technique and then Zn0.95Co0.05O pellet form was prepared.

  • Morphological and structural properties of the Zn0.95Co0.05O were examined by SEM and XRD.

  • Impedance and electrical properties of the Zn0.95Co0.05O were examined within the large range of temperature and frequencies.

  • Relaxation times were obtained at different temperatures.

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Acknowledgements

This work was financially supported by the Scientific Research Projects foundation of Gazi University (BAP 05/2020-20).

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, Gazi University, Ankara, Turkey

    Neslihan Turan, Pınar Oruç, Yeşim Demirölmez, Ayten Seçkin, Ali Orkun Çağırtekin, Sukru Cavdar & Haluk Koralay

  2. Department of Energy Systems Engineering, Faculty of Engineering, Giresun University, Giresun, Turkey

    Nihat Tuğluoğlu

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Contributions

NT: Investigation, experiment, formal analysis, visualization, writing—original draft, PO: Investigation, formal analysis, visualization, writing —original draft, YD: Investigation, experiment, formal analysis, visualization, writing—original draft, AS: Investigation, formal analysis, visualization, writing—original draft, AOÇ: Formal analysis, experimental measurement, ŞÇ: Supervision, resources, investigation, writing—original draft, visualization, writing-review & editing, HK: Supervision, resources, investigation, writing—original draft, visualization, writing-review & editing, NT: Project administration, supervision, investigation, writing—original draft, visualization, writing-review & editing.

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Correspondence to Pınar Oruç.

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Turan, N., Oruç, P., Demirölmez, Y. et al. Investigation of temperature dependent electrical and impedance characteristics of bulk Zn0.95Co0.05O. J Sol-Gel Sci Technol 100, 147–159 (2021). https://doi.org/10.1007/s10971-021-05623-w

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