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<p>Ba<sub>2</sub>FeMoO<sub>6</sub> double perovskite was synthesized using the sol–gel method. An experiment was conducted to study the impact of heat treatment on pellet (S1) and powder (S2) samples by exposing them to a mixture of H<sub>2</sub>/Ar gases in a furnace simultaneously. X-ray powder diffraction confirmed the phase purity of the samples. Rietveld refinement revealed a cubic structure with space group Fm-3&#xa0;m and no impurities. The average grain size of the samples was about 214&#xa0;nm. Absorption peaks at 825–830&#xa0;cm<sup>−1</sup> and 424–430&#xa0;cm<sup>−1</sup> were attributed to the symmetric stretching and bending vibration of the Mo–O bond in the octahedral MoO<sub>6</sub> of the samples, respectively. The direct energy band gap of the samples was measured at about 2.30&#xa0;eV. The magnetic properties showed a decrease in magnetization for the S2 sample. In contrast, the heat treatment on the samples did not affect the magnetic susceptibility and transition temperature of the samples.</p>

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Effect of Heat Treatment on Structural and Magnetic Properties of Ba2FeMoO6

  • 期刊论文

  • 发表日期：

    2025年1月11日

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  • Z. Ghorbani,
  • M. H. Ehsani

摘要

Ba2FeMoO6 double perovskite was synthesized using the sol–gel method. An experiment was conducted to study the impact of heat treatment on pellet (S1) and powder (S2) samples by exposing them to a mixture of H2/Ar gases in a furnace simultaneously. X-ray powder diffraction confirmed the phase purity of the samples. Rietveld refinement revealed a cubic structure with space group Fm-3 m and no impurities. The average grain size of the samples was about 214 nm. Absorption peaks at 825–830 cm−1 and 424–430 cm−1 were attributed to the symmetric stretching and bending vibration of the Mo–O bond in the octahedral MoO6 of the samples, respectively. The direct energy band gap of the samples was measured at about 2.30 eV. The magnetic properties showed a decrease in magnetization for the S2 sample. In contrast, the heat treatment on the samples did not affect the magnetic susceptibility and transition temperature of the samples.