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Colossal dielectric, relaxor ferroelectric, diamagnetic and weak ferromagnetic properties of NdCrO3 perovskite nanoparticles

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Abstract

The NdCrO3 perovskite nanoparticles have been successfully synthesized using sol–gel auto-combustion process. Structural and morphological characterizations of the material have been performed at room temperature using XRD and SEM, respectively. Frequency- and temperature-dependent dielectric measurements have been performed in the range of 1 Hz–10 MHz and RT − 300 °C, respectively. The dielectric constant is found to be in the order of ε′ > 103 at room temperature, indicating the colossal dielectric constant behaviour. Ferroelectric phase transition temperature has increased with an increase in frequency, suggesting that the material is a relaxor ferroelectric nature. Temperature- and field-dependent magnetization measurements have been carried out in the temperature range (5–400 K) and field up to 5 T. M–T curve exhibited a diamagnetic-like behaviour in low temperature and low fields. Two magnetic transitions were found at TN1 (223 K) and TN2 (33 K) which correspond to para to weak ferromagnetic transition and Nd3+ spin ordering, respectively. Hysteresis loop noticed weak ferromagnetism.

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Acknowledgements

One of the authors, Jada Shanker, would like to thank SRF-UGC-RGNF for providing financial assistance to carry out this work.

Funding

Funding was provided by University Grants Commission (Grant No. F117.1/201617/RGNF201517SCTEL27682/(SAIII/Website)).

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Authors and Affiliations

  1. Department of Physics, Osmania University, Hyderabad, Telangana, India

    Jada Shanker & D. Suresh Babu

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

    M. Buchi Suresh

  3. H&S Department, Marri Laxman Reddy Institute of Technology and Management, Hyderabad, Telangana, India

    G. Narsinga Rao

Authors
  1. Jada Shanker
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  2. M. Buchi Suresh
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  3. G. Narsinga Rao
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  4. D. Suresh Babu
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Correspondence to Jada Shanker.

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Shanker, J., Buchi Suresh, M., Narsinga Rao, G. et al. Colossal dielectric, relaxor ferroelectric, diamagnetic and weak ferromagnetic properties of NdCrO3 perovskite nanoparticles. J Mater Sci 54, 5595–5604 (2019). https://doi.org/10.1007/s10853-018-03226-5

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