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<p>The effects of nano-sized Ni<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> (NZFO) addition on the superconducting properties of Bi<sub>1.6</sub>Pb<sub>0.4</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub> (Bi-2212) were investigated. Samples were prepared using the solid-state reaction method with NZFO addition of 0 to 0.5 wt%. The structural, electrical, and magnetic properties were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), electrical resistance measurements, and AC susceptibility analysis. All samples exhibited normal metallic characteristics above onset transition temperature, <i>T</i><sub>c−onset</sub>. The resistance versus temperature measurements showed <i>T</i><sub>c−onset</sub> and zero transition temperature, <i>T</i><sub>c−zero</sub> for all samples ranging between 72 and 82&#xa0;K, and 55 and 70&#xa0;K, respectively. Scanning electron microscopy (SEM) revealed noticeable microstructural changes with higher additions of nano-sized NZFO. Despite these changes, the addition of nano-sized NZFO did not significantly suppress the intra- and intergrain characteristics of the Bi-2212 phase. The <i>x</i> = 0.06–0.08 wt% samples showed the highest intergrain peak temperatures, Josephson current and Josephson coupling energy even though the transition temperatures and Bi-2212 phase volume fraction were suppressed. This work showed that the appropriate addition of nano-sized NZFO could significantly enhance grain connectivity and critical current density, highlighting its potential as an effective flux pinning center for Bi-based superconductors.</p>

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Influence of Ni0.5Zn0.5Fe2O4 nanoparticles on the superconducting properties and AC susceptibility of Bi1.6Pb0.7Sr2CaCu2O8 superconductor

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Siti Nurul Sajidah Haziqah Zamingan,
  • Muhamad Afiq Haiqal Azlan,
  • A. B. P. Ilhamsyah,
  • Masnita Mat Jusoh,
  • A. M. Mahat,
  • R. Abd-Shukor,
  • Nurul Raihan Mohd Suib

摘要

The effects of nano-sized Ni0.5Zn0.5Fe2O4 (NZFO) addition on the superconducting properties of Bi1.6Pb0.4Sr2CaCu2O8 (Bi-2212) were investigated. Samples were prepared using the solid-state reaction method with NZFO addition of 0 to 0.5 wt%. The structural, electrical, and magnetic properties were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), electrical resistance measurements, and AC susceptibility analysis. All samples exhibited normal metallic characteristics above onset transition temperature, Tc−onset. The resistance versus temperature measurements showed Tc−onset and zero transition temperature, Tc−zero for all samples ranging between 72 and 82 K, and 55 and 70 K, respectively. Scanning electron microscopy (SEM) revealed noticeable microstructural changes with higher additions of nano-sized NZFO. Despite these changes, the addition of nano-sized NZFO did not significantly suppress the intra- and intergrain characteristics of the Bi-2212 phase. The x = 0.06–0.08 wt% samples showed the highest intergrain peak temperatures, Josephson current and Josephson coupling energy even though the transition temperatures and Bi-2212 phase volume fraction were suppressed. This work showed that the appropriate addition of nano-sized NZFO could significantly enhance grain connectivity and critical current density, highlighting its potential as an effective flux pinning center for Bi-based superconductors.