1. Nada Čitaković, Vojna akademija, Serbia
Abstract: In this study hematite nanoparticles (α-Fe2O3) were synthesized by solvothermal synthesis method. The ability to tailor the morphology of hematite nanoparticles by optimizing synthesis conditions is of significant interest, as particle shape directly influences physicochemical properties, including surface reactivity, magnetic behavior, and optical properties. The morphology and particle sizes of the synthesized samples were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The magnetic properties of the hematite nanoparticles were investigated across a broad temperature range (50–300 K) and under various applied magnetic fields (up to 1000 Oe) utilizing a vibrating-sample magnetometer. The magnetic properties exhibit a strong shape and size dependence, with higher coercivity (1725 Oe) in plate-like nanoparticles compared to irregular ones (235 Oe), remanent magnetization at 300 K from 0,061 emu/g to 0,122 emu/g and saturation magnetization at 300 K from 0,788 emu/g to 0,875 emu/g. It is well documented that the Morin transition temperature is significantly influenced by particle size, decreasing as the particle size decreases.
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Thematic field:
SIMPOZIJUM A - Nauka materije, kondenzovane materije i fizika čvrstog stanja
Date:
28.07.2025.
Contemporary Materials 2025 - Savremeni Materijali
Paper file
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