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<p>MgFe<sub>2−<i>x</i></sub>Bi<sub><i>x</i></sub>O<sub>4</sub> (<i>x</i> = 0.0, 0.1, 0.3, and 0.5) nanostructures were synthesized using a combustion technique. The analysis revealed a cubic spinal structure. Crystallite size was calculated using the Debye–Scherrer formula. Fourier transform infrared (FTIR) spectroscopy showed absorption peaks at 561 and 434&#xa0;cm<sup>−1</sup>, indicating interaction between metal and oxygen at octahedral and tetrahedral points in the structure. Ultraviolet–visible (UV–Vis) analysis showed a band gap energy of 1.78–1.94&#xa0;eV. Field-emission scanning electron microscopy (FE-SEM) images showed an irregular grain size distribution. Energy-dispersive x-ray spectroscopy (EDX) and elemental mapping analyses confirmed the presence and distribution of Bi, Mg, Fe, and O. Pure and Bi-doped MgFe<sub>2−<i>x</i></sub>Bi<sub><i>x</i></sub>O<sub>4</sub> samples exhibited magnetic characteristics, with high coercivity and magnetic saturation values at <i>x</i> = 0.3, making them suitable for a wide range of technical applications. The hysteresis loops yielded several magnetic parameters, including saturation magnetization (Ms), remanence (Mr), and coercivity (Hc).</p>

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Investigation of Magnetic and Optical Characteristics of MgFe2O4 and MgFe2−xBixO4 Nanoparticles Synthesized by Combustion Method

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • S. Muthulakshmi,
  • P. Elaiyaraja,
  • M. Elumalai,
  • C. Suresh,
  • S. Yuvaraj,
  • Jothi Ramalingam Rajabathar,
  • Dhaifallah M. Al-Dhayan,
  • S. Revathi,
  • Chandra Sekhar Dash,
  • M. Sundararajan,
  • Partha Sarathi Subudhi,
  • S. Muruganantham

摘要

MgFe2−xBixO4 (x = 0.0, 0.1, 0.3, and 0.5) nanostructures were synthesized using a combustion technique. The analysis revealed a cubic spinal structure. Crystallite size was calculated using the Debye–Scherrer formula. Fourier transform infrared (FTIR) spectroscopy showed absorption peaks at 561 and 434 cm−1, indicating interaction between metal and oxygen at octahedral and tetrahedral points in the structure. Ultraviolet–visible (UV–Vis) analysis showed a band gap energy of 1.78–1.94 eV. Field-emission scanning electron microscopy (FE-SEM) images showed an irregular grain size distribution. Energy-dispersive x-ray spectroscopy (EDX) and elemental mapping analyses confirmed the presence and distribution of Bi, Mg, Fe, and O. Pure and Bi-doped MgFe2−xBixO4 samples exhibited magnetic characteristics, with high coercivity and magnetic saturation values at x = 0.3, making them suitable for a wide range of technical applications. The hysteresis loops yielded several magnetic parameters, including saturation magnetization (Ms), remanence (Mr), and coercivity (Hc).