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Effect of temperature on dielectric properties of cobalt-doped SnSe polycrystals

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Abstract

In this work, the hydrothermal synthesis of cobalt-doped tin selenide (SnSe) is reported. The phases of the samples were obtained as single phase using X-ray diffraction. 3D flower-like morphology is revealed up to x = 0.05 of Co, and thereafter, they transformed into a rod-like shape for higher concentrations as revealed by scanning electron microscope. The temperature-dependent dielectric properties and electrical modulus studies were investigated in a frequency range of 100 Hz–12 MHz for temperatures 323–523 K. Large values of dielectric constant (of the order of 108–109) in the low-frequency region and small values of dielectric constant (ε' ≈ 50–1400) in the high-frequency region are obtained at various temperatures for Co-doped SnSe. The temperature dependence of frequency exponent ‘s’ indicates that the correlated barrier hopping is the probable mechanism for the hopping of charge carriers. The responses in the dielectric studies show the applications of the material in microelectronic and dielectric device applications.

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Acknowledgements

The authors gratefully acknowledge ‘The Director, ARCI, Hyderabad’ for the help in dielectric measurements.

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The authors have not disclosed any funding.

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Authors and Affiliations

  1. Department of Physics, National Institute of Technology, Warangal, Telangana, 506004, India

    Manjula Nerella & Sobha Bathulapalli

  2. Department of Physics, School of Sciences, SR University, Warangal, Telangana, India

    Nagaraju Macherla

  3. International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur, Hyderabad, Telangana, India

    Madireddy Buchi Suresh

Authors
  1. Manjula Nerella
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  2. Nagaraju Macherla
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  3. Madireddy Buchi Suresh
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  4. Sobha Bathulapalli
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Contributions

MN was involved in conceptualization, data curation, formal analysis, investigation, methodology, validation, visualization, writing the original draft, software, resources and writing—reviewing and editing. NM and MBS contributed to data curation, formal analysis, visualization, validation and writing—reviewing and editing. SB was responsible for supervision, funding acquisition, resources, conceptualization, investigation, methodology, validation, visualization and writing—reviewing and editing.

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Correspondence to Manjula Nerella.

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Nerella, M., Macherla, N., Suresh, M.B. et al. Effect of temperature on dielectric properties of cobalt-doped SnSe polycrystals. J Mater Sci: Mater Electron 34, 120 (2023). https://doi.org/10.1007/s10854-022-09521-x

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