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Multiferroic and optical properties of Pr-substituted bismuth ferrite ceramics

Authors

  • Vikash Singh,

    1. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, A-10, Sector-62, Noida-201307, Uttar Pradesh, India
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  • Subhash Sharma,

    1. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, A-10, Sector-62, Noida-201307, Uttar Pradesh, India
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  • R. K. Dwivedi,

    Corresponding author
    • Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, A-10, Sector-62, Noida-201307, Uttar Pradesh, India
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  • Manoj Kumar,

    1. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, A-10, Sector-62, Noida-201307, Uttar Pradesh, India
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  • R. K. Kotnala

    1. National Physical Laboratory (CSIR), Dr. K. S. Krishnan Marg, New Delhi 110012, India
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Corresponding author: e-mail rk.dwivedi@jiit.ac.in, Phone: +911202594366, Fax: +911202400986

Abstract

Pr-doped BiFeO3 ceramics with x ≤ 0.20 were synthesized by a solid-state reaction method. X-ray diffraction patterns of these samples have shown single-phase rhombohedral structure with R3c space group symmetry. Remanent magnetization has been found to increase with Pr concentration. Magnetization versus temperature plots for x = 0.0 and 0.20 exhibit a broad magnetic anomaly at around 375 and 393 °C, respectively, indicating the Neel temperature “TN”. Dielectric constant (ϵr) versus T plots exhibit dielectric anomalies at around 375 °C in these materials, which may correspond to the transition temperature TN. The photoluminescence spectra of these ceramics exhibit band-edge emission in the blue region and defect-related emission in the green region. The FTIR spectra show two broad vibrational modes at 430 and 560 cm−1.

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