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Complex impedance analysis of silver-phosphate glassy system doped with different concentrations of silver iodide

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Abstract

Electric and dielectric properties of silver phosphate glass of the composition (NH4H2PO4)1−x (AgNO3)1−x(AgI)x (x = 0, 0.05, 0.10, 0.15, 0.20 and 0.25) were characterised using impedance spectroscopy. Samples were synthesized using the conventional melt quenching method. A decrease in the bulk resistance of the samples was observed with either increasing the temperature and/or dopant concentration, which indicates a semi-conducting behaviour with thermal activation conduction mechanism. In addition, the relaxation peak was observed to shift towards higher frequency with increasing temperature or dopant concentration. The slight asymmetrical shape of the relaxation peak together with the presence of the centre of the semicircle in Nyquist plot below the real axis indicate a non-Debye relaxation type. Electrical conductivity was found to switch from DC-conductivity to AC-conductivity at a certain frequency (crossover frequency). The crossover activation energy showed an inverse proportion with dopant concentration. The material was observed to follow Jonscher’s power law, where the values of the power law exponent were found to decrease with increasing temperature. This behaviour indicates that the dominant conduction mechanism can be well-explained in terms of the Correlated Barrier Hopping (CBH) model. The activation energy and the hopping energy were found to decrease with increasing AgI-dopant level, indicating an enhancement in the electrical conductivity of the samples.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

The financial support from the Hashemite University is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, The Hashemite University, P. O. Box 330127, Zarqa, 13133, Jordan

    Adel A. Shaheen, Mufeed Maghrabi, H. Ghannam & Anas Al-Reyahi

  2. Physics Program, Department of Mathematics, Statistics and Physics, College of Arts and Sciences, Qatar University, Doha, Qatar

    Ahmad I. Ayesh

  3. Department of Basic Sciences, Middle East University, Amman, 11831, Jordan

    Ahmad A. Mousa

  4. Applied Science Research Centre, Applied Science Private University, Amman, Jordan

    Ahmad A. Mousa

Authors
  1. Adel A. Shaheen
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  2. Mufeed Maghrabi
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  4. Anas Al-Reyahi
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  5. Ahmad I. Ayesh
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  6. Ahmad A. Mousa
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Contributions

All authors contribute to the study conception and design. Materials preparation, data collection and analysis were performed by AAS, HG, MM, AA-R and AAM. The first draft of the manuscript was written by AIA and all authors comment in the previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Adel A. Shaheen.

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Shaheen, A.A., Maghrabi, M., Ghannam, H. et al. Complex impedance analysis of silver-phosphate glassy system doped with different concentrations of silver iodide. Appl. Phys. A 130, 52 (2024). https://doi.org/10.1007/s00339-023-07220-w

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