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Enhanced dielectric properties and relaxation behavior in double perovskite-polymer-based flexible 0–3 nanocomposite films

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Abstract

The double perovskite nanostructures were prepared by using hydrothermal route to obtain single-phase rhombohedral structure. The flexible magneto-dielectric nanocomposite films with double perovskite La2NiMnO6 (LNMO) nanostructures and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer were fabricated by solution casting method. The structural, thermal, and dielectric properties of the developed double perovskite nanostructures and their combination with (PVDF-HFP) as nanocomposite films were investigated. The fabricated nanocomposite films demonstrated an improvement in the crystalline phase with the increase in the loading of La2NiMnO6 (0–40 wt%). The nanocomposite film with 30 wt% of LNMO exhibited higher dielectric permittivity (> 40) alongside with a dielectric loss of as low as 0.6 at room temperature and thereafter it reached percolation threshold. The dielectric studies also revealed an efficient charge separation and a strong interfacial polarization at the interfaces by facilitating the charge accumulation in the nanocomposites than that of the pure polymer film. The thermally activated relaxation behavior in the films followed the Arrhenius law and the obtained activation energies were found to be ~ 1.12 eV.

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Acknowledgements

The author R.A gratefully acknowledges the FONDECYT Postdoctoral Project No.: 3180172, Government of Chile, Santiago, for the financial assistance.

Funding

This study was funded by The National Fund for Scientific and Technological Development (FONDECYT) Project: 3180172.

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Authors and Affiliations

  1. Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad Tecnológica Metropolitana, Santiago, Chile

    Radhamanohar Aepuru

  2. Department of Physics, Indian Institute of Technology, Guwahati, India

    Vishwajit M. Gaikwad

  3. Institute of Scientific and Technological Research (IDICTEC), University of Atacama, Copayapu 485, Copiapo, Chile

    R. Udayabhaskar

  4. Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, 411025, India

    H. S. Panda

  5. Advanced Ceramics and Nanotechnology Laboratory, Department of Materials Engineering, Faculty of Engineering, University of Concepción, 4070409, Concepción, Chile

    Mangalaraja Ramalinga Viswanathan

  6. Technological Development Unit (UDT), University of Concepcion, Coronel Industrial Park, Coronel, Chile

    Mangalaraja Ramalinga Viswanathan

Authors
  1. Radhamanohar Aepuru
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  2. Vishwajit M. Gaikwad
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  3. R. Udayabhaskar
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  5. Mangalaraja Ramalinga Viswanathan
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Correspondence to Radhamanohar Aepuru or Mangalaraja Ramalinga Viswanathan.

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Aepuru, R., Gaikwad, V.M., Udayabhaskar, R. et al. Enhanced dielectric properties and relaxation behavior in double perovskite-polymer-based flexible 0–3 nanocomposite films. J Mater Sci: Mater Electron 31, 13477–13486 (2020). https://doi.org/10.1007/s10854-020-03902-w

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