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<p>The polycrystalline double perovskite La<sub>2</sub>NiFeO<sub>6</sub> nanocrystallites were synthesized using the wet chemical sol–gel method. X-ray diffraction (XRD) analysis confirmed the formation of a single-phase material with a monoclinic P<sub>21/n</sub> structure and an estimated crystallite size of 17&#xa0;nm. Selected Area Electron Diffraction (SAED) patterns revealed the presence of diffraction rings, further indicating the monoclinic structure. Dielectric and impedance studies, conducted as functions of temperature and frequency, highlighted the contributions of grains and grain boundaries to the relaxation processes. The AC conductivity values ranged from 2.45 × 10<sup>–5</sup> S/m to 5.51 × 10<sup>–5</sup> S/m S/m over a temperature range of 300&#xa0;K to 473&#xa0;K at a frequency of 2&#xa0;kHz. Notably, La<sub>2</sub>NiFeO<sub>6</sub> exhibits novel ferromagnetic semiconductor properties and undergoes a spin glass transition at approximately 50&#xa0;K. This comprehensive investigation provides the first report on the structural, dielectric, and magnetic properties of La<sub>2</sub>NiFeO<sub>6</sub>, underscoring its potential as a promising material for advanced data storage and spintronic device applications.</p>

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Structural, magnetic, dielectric properties of double perovskite- La2NiFeO6 synthesized by wet chemical route

  • 期刊论文

  • 发表日期：

    2025年1月14日

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  • Shivani Punj,
  • Rajib Mondal,
  • Souvik Chatterjee,
  • Davit B. Dhruv,
  • Ashok Kumar,
  • Alesh Kumar,
  • Jashandeep Singh

摘要

The polycrystalline double perovskite La2NiFeO6 nanocrystallites were synthesized using the wet chemical sol–gel method. X-ray diffraction (XRD) analysis confirmed the formation of a single-phase material with a monoclinic P21/n structure and an estimated crystallite size of 17 nm. Selected Area Electron Diffraction (SAED) patterns revealed the presence of diffraction rings, further indicating the monoclinic structure. Dielectric and impedance studies, conducted as functions of temperature and frequency, highlighted the contributions of grains and grain boundaries to the relaxation processes. The AC conductivity values ranged from 2.45 × 10–5 S/m to 5.51 × 10–5 S/m S/m over a temperature range of 300 K to 473 K at a frequency of 2 kHz. Notably, La2NiFeO6 exhibits novel ferromagnetic semiconductor properties and undergoes a spin glass transition at approximately 50 K. This comprehensive investigation provides the first report on the structural, dielectric, and magnetic properties of La2NiFeO6, underscoring its potential as a promising material for advanced data storage and spintronic device applications.