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<p>An alkali-based ceramic composite, LiMnFeO<sub>4</sub>, was synthesized via the solid-state reaction method. X-ray diffraction (XRD) analysis confirms the presence of two cubic crystalline phases. The calculated average crystallite size of 88.84&#xa0;nm with a micro-strain value of 0.00333. Scanning electron microscopy (SEM) reveals a homogeneous grain distribution with an average grain size of approximately 650&#xa0;nm. Elemental composition analysis through energy-dispersive X-ray spectroscopy (EDX) verifies the successful incorporation of Li, Mn, Fe, and O into the lattice. Optical properties investigated using UV–visible spectroscopy indicate multiple bandgaps derived from Tauc’s plots, including direct allowed (0.85&#xa0;eV, 4.46&#xa0;eV), direct forbidden (1.05&#xa0;eV, 5.21&#xa0;eV), indirect allowed (0.22&#xa0;eV, 5.29&#xa0;eV), and indirect forbidden (1.15&#xa0;eV, 5.47&#xa0;eV). Fourier transform infrared spectroscopy (FTIR) confirms characteristic vibrational modes associated with functional groups. A high dielectric constant in the order of 10<sup>7</sup> at lower frequencies, emphasizing the suitability of LiMnFeO<sub>4</sub> for energy storage and dielectric capacitor applications.</p>

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Exploring the unique structural, optical, and electrical properties of Li–Mn–Fe-based composite ceramic: a pioneering step toward electronic devices

  • 期刊论文

  • 发表日期：

    2025年7月25日

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  • Aniket Padhy,
  • Praveen Priyaranjan Nayak,
  • Biswa Ranjan Swain,
  • Ashish Kumar,
  • Guru Prasad Mishra

摘要

An alkali-based ceramic composite, LiMnFeO4, was synthesized via the solid-state reaction method. X-ray diffraction (XRD) analysis confirms the presence of two cubic crystalline phases. The calculated average crystallite size of 88.84 nm with a micro-strain value of 0.00333. Scanning electron microscopy (SEM) reveals a homogeneous grain distribution with an average grain size of approximately 650 nm. Elemental composition analysis through energy-dispersive X-ray spectroscopy (EDX) verifies the successful incorporation of Li, Mn, Fe, and O into the lattice. Optical properties investigated using UV–visible spectroscopy indicate multiple bandgaps derived from Tauc’s plots, including direct allowed (0.85 eV, 4.46 eV), direct forbidden (1.05 eV, 5.21 eV), indirect allowed (0.22 eV, 5.29 eV), and indirect forbidden (1.15 eV, 5.47 eV). Fourier transform infrared spectroscopy (FTIR) confirms characteristic vibrational modes associated with functional groups. A high dielectric constant in the order of 107 at lower frequencies, emphasizing the suitability of LiMnFeO4 for energy storage and dielectric capacitor applications.