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<p>This study begins by examining the susceptibility of ferromagnetic particles and introducing magnetic dipole theory. A two-dimensional multichain microstructure model that incorporates ferromagnetic particles within a superconducting matrix has been developed. By integrating this superconducting composite model with the AC susceptibility method, the relationship between the volume fraction of ferromagnetic particles and their relative permeability is investigated. Furthermore, the influence of relative permeability on flux dynamics and key superconducting electrical parameters is analyzed. The results demonstrate a linear correlation between relative permeability and the volume fraction of ferromagnetic particles. Additionally, relative permeability significantly affects superconducting electrical coefficients, magnetic relaxation, hysteresis loops, and the real and imaginary components of AC susceptibility, as well as superconductor surface barriers.</p>

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Investigation of magnetization and ac susceptibility of ferromagnetic particle-superconducting matrix composites

  • 期刊论文

  • 发表日期：

    2025年7月11日

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  • Xinyu He,
  • Yufeng Zhao

摘要

This study begins by examining the susceptibility of ferromagnetic particles and introducing magnetic dipole theory. A two-dimensional multichain microstructure model that incorporates ferromagnetic particles within a superconducting matrix has been developed. By integrating this superconducting composite model with the AC susceptibility method, the relationship between the volume fraction of ferromagnetic particles and their relative permeability is investigated. Furthermore, the influence of relative permeability on flux dynamics and key superconducting electrical parameters is analyzed. The results demonstrate a linear correlation between relative permeability and the volume fraction of ferromagnetic particles. Additionally, relative permeability significantly affects superconducting electrical coefficients, magnetic relaxation, hysteresis loops, and the real and imaginary components of AC susceptibility, as well as superconductor surface barriers.