Magnetic properties of CoFe$$_{2}$$O$$_{4}$$ nanoparticles: experimental characterization and numerical analysis using the Ising model
Year: 2025
Type: article
Abstract: In this work, we synthesized superpara-magnetic cobalt ferrite (CoFe $$_{2}$$ 2 O $$_{4}$$ 4 ) magnetic nanoparticles using the co-precipitation method and performed a comprehensive structural and magnetic characterization. Structural characterization techniques, including X-ray diffraction, Raman spectroscopy, and HRTEM, confirmed the formation of an inverse spinel structure with a lattice parameter of $$a = 8.41$$ a = 8.41 Å and an average crystallite size of $$D= 17.7\pm 6.5$$ D = 17.7 ± 6.5 nm. Raman peak fitting revealed broadened modes, consistent with phonon confinement effects. SQUID magnetometry confirmed superparamagnetic-like behavior of the nanoparticles at room temperature, characterized by low coercivity and remanence, with a blocking temperature of 210 K and saturation magnetization of $$M_{s}=51$$ M s = 51 emu/g. Complementing the experimental work, we implemented a two-dimensional Ising model through Monte Carlo simulations to analyze the magnetic response within the nanoparticle system.
Source: Journal of Nanoparticle Research
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,890
OpenAlex ID: W4415376267