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<p>Room temperature multiferroic properties, such as antiferromagnetism concurrent with ferroelectricity&#xa0;in Bismuth Ferrite (BiFeO<sub>3</sub>), have triggered numerous investigations in its preparation and characterization. In this article, we report the&#xa0;modulation of multiferroic properties of high-density BiFeO<sub>3</sub> (BFO) ceramics sintered at temperatures between 625&#xa0;°C and 825&#xa0;°C using Spark Plasma Sintering (SPS). The highest density was obtained in samples sintered at 750&#xa0;°C. XRD spectrum indicated that BiFeO<sub>3</sub> (BFO) sintered at 625 to 825&#xa0;°C exhibited an R3c phase. Structural impurities as well as remanent and saturation magnetizations and coercive fields were unaffected in samples sintered at temperatures up to 750&#xa0;°C, after both impurities and magnetizations increased while coercivity decreased&#xa0;beyond this temperature. During&#xa0;which a sharp increase was noted, reaching maximum values of approximately 0.05&#xa0;emu/g for remanent magnetization and 1.37&#xa0;emu/g for saturation magnetization. Additionally, BFO-750 exhibited higher remanent (<i>P</i><sub>r</sub>) and saturation (<i>P</i><sub>S</sub>) polarization, while BFO-800 showed an enhanced piezoelectric coefficient of approximately 6.32 pCN<sup>−1</sup> compared to other samples.</p>

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Multiferroic properties of BiFeO3 modulate with spark plasma sintering temperatures

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Md. Shofiqul Islam,
  • Md. Jaynal Abedin,
  • Fahmida Gulshan,
  • Syed Ansar Md. Tofail,
  • Ehtsham Ul Haq,
  • Mehedi Hasan Rizvi,
  • M. A. Gafur,
  • Ahmed Sharif

摘要

Room temperature multiferroic properties, such as antiferromagnetism concurrent with ferroelectricity in Bismuth Ferrite (BiFeO3), have triggered numerous investigations in its preparation and characterization. In this article, we report the modulation of multiferroic properties of high-density BiFeO3 (BFO) ceramics sintered at temperatures between 625 °C and 825 °C using Spark Plasma Sintering (SPS). The highest density was obtained in samples sintered at 750 °C. XRD spectrum indicated that BiFeO3 (BFO) sintered at 625 to 825 °C exhibited an R3c phase. Structural impurities as well as remanent and saturation magnetizations and coercive fields were unaffected in samples sintered at temperatures up to 750 °C, after both impurities and magnetizations increased while coercivity decreased beyond this temperature. During which a sharp increase was noted, reaching maximum values of approximately 0.05 emu/g for remanent magnetization and 1.37 emu/g for saturation magnetization. Additionally, BFO-750 exhibited higher remanent (Pr) and saturation (PS) polarization, while BFO-800 showed an enhanced piezoelectric coefficient of approximately 6.32 pCN−1 compared to other samples.