Structural, Magnetic and Thermal Studies of Hydrothermally Synthesized Ni-Doped Bifeo3 Nanoparticles

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@article{1724954,
      author = {T Firoz Khan, S Devendra, D Chandra Sekhar, J Chandra Sekhar, K Sreelekha},
      title = {Structural, Magnetic and Thermal Studies of Hydrothermally Synthesized Ni-Doped Bifeo3 Nanoparticles},
      journal = {Iconic Research And Engineering Journals},
      year = {2026},
      volume = {10},
      number = {1},
      pages = {4239-4249},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1724954.pdf},
      abstract = {Ni-doped bismuth ferrite (Bi₁₋ₓNiₓFeO₃, x = 0.2–0.8) nanoparticles were successfully synthesized by the hydrothermal method and investigated systematically to understand the influence of Ni²⁺ substitution on their structural, magnetic, and thermal properties. The structural characteristics of the prepared nanoparticles were examined using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). XRD analysis confirmed the formation of a crystalline BiFeO₃-based phase, with systematic variations in lattice parameters and crystallite size resulting from Ni²⁺ incorporation into the BiFeO₃ lattice. The observed changes in structural parameters indicate lattice distortion associated with the substitution of Ni²⁺ ions. FESEM and HRTEM analyses revealed nanoscale grains with relatively homogeneous morphology.

The magnetic properties were evaluated from room-temperature magnetization by vibration sample magnetometer (VSM). Ni substitution significantly modified the magnetic response of BiFeO₃ nanoparticles, with saturation magnetization values varying with Ni concentration. The enhanced magnetic behaviour is attributed to the modification of Fe–O–Fe super exchange interactions, spin canting, and disruption of the intrinsic cycloidal spin structure of BiFeO₃. Thermal behaviour was investigated using Thermo-Gravimetric analysis and Differential Scanning Calorimetry (TG–DSC), which revealed characteristic stages of mass loss and thermal transitions associated with dehydration, decomposition of precursor residues, crystallization, and formation of the stable oxide phase. The combined structural, magnetic, and thermal results demonstrate that Ni incorporation is an effective approach for tailoring the multifunctional properties of BiFeO₃ nanoparticles, making them promising candidates for potential applications in magnetic, spintronic, and multifunctional nano electronic devices.},
      keywords = {BiFeO₃, FESEM, HRTEM, Hydrothermal synthesis, Nanoparticles, Ni doping, TG–DSC, VSM, X-ray diffraction},
      month = {July},
      doi = {https://doi.org/10.64388/ire1724954}
  }