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Abstract <p>Peculiarities of the structure and magnetic properties of iron-based (α-Fe) nanoparticles synthesized by electrical explosion of a wire and subsequent ball milling are studied. Structural analysis showed that the particles consist of an α-Fe core with a nanocrystalline oxide (FeO<sub><i>x</i></sub>) shell. Based on experimental data (XRD, TEM), a micro-magnetic digital twin of a particle 50 nm in diameter is developed using a Mumax3 software, and portions of the magnetic hysteresis loops are calculated for two cases, namely, taking into account thermal fluctuations (for a temperature of 293 K) and ignoring them (for a temperature of 0 K). The effect of the nanocrystalline oxide layer on the magnetic structure of the core is found, and the general appearance of magnetic hysteresis loop is determined.</p>

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Core–Shell α-Fe/FeOx Nanoparticles Synthesized by Electrical Explosion of a Wire and Ball Milling. Experience in the Development of a Micromagnetic Digital Twin

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • G. Yu. Mel’nikov,
  • E. A. Burban,
  • A. V. Svalov,
  • A. A. Yushkov,
  • G. V. Kurlyandskaya

摘要

Abstract

Peculiarities of the structure and magnetic properties of iron-based (α-Fe) nanoparticles synthesized by electrical explosion of a wire and subsequent ball milling are studied. Structural analysis showed that the particles consist of an α-Fe core with a nanocrystalline oxide (FeOx) shell. Based on experimental data (XRD, TEM), a micro-magnetic digital twin of a particle 50 nm in diameter is developed using a Mumax3 software, and portions of the magnetic hysteresis loops are calculated for two cases, namely, taking into account thermal fluctuations (for a temperature of 293 K) and ignoring them (for a temperature of 0 K). The effect of the nanocrystalline oxide layer on the magnetic structure of the core is found, and the general appearance of magnetic hysteresis loop is determined.