Tuesday publication post! 📖 In this newest publication, the authors used the #FusionAX system to investigate how annealing tunes the morphology, crystallinity, and magnetic properties of 135 nm Fe₃O₄ nanospheres, revealing a direct connection between particle structure and magnetic behavior.
By systematically varying annealing temperature and duration, the study shows how polycrystalline nanospheres evolve toward smoother, more cube-like morphologies with increasing crystallite size. #AXONSynchronicity was used to record the annealing process at the nanoscale.
Key findings:
🔬 Annealing drives Fe₃O₄ nanospheres toward a more cubic morphology and increases crystallite size.
🧲 Saturation magnetization and coercivity generally increase as crystallinity and cube-like morphology develop.
🌡️ Annealing between 500–850 °C enhances crystallite size and saturation magnetization, while coercivity decreases at 850 °C.
⏱️ Annealing at 700 °C for 12 h provides an optimal combination of crystallite size and magnetic properties.
💡 Prolonged annealing at 700 °C (24 h) produces the largest crystallite size but unexpectedly reduces saturation magnetization.
This work highlights the strong relationship between morphology, crystallinity, and magnetic behavior in Fe₃O₄ nanoparticles beyond the superparamagnetic size regime, while providing a facile route to tailor nanosphere properties toward those of directly synthesized nanocubes.
Want to read the entire publication?
https://www.doi.org/10.3390/ma19132911
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