Fabrication of a novel chromium-iron oxide (Cr2Fe6O12) nanoparticles by thermal treatment method

• Published in: Journal of magnetism and magnetic materials 2015-09, Vol.389, p.113-119
• Main Authors: Naseri, Mahmoud Goodarz, Kamari, Halimah Mohamed, Dehzangi, Arash, Kamalianfar, Ahmad, Saion, Elias B.
• Format: Article
• Language: English
• Subjects: Calcination; Electron paramagnetic resonance; Magnetic properties; X-ray diffraction
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2015.04.013

In this research,a novel chromium-iron oxide (Cr2Fe6O12) nanoparticle with rhombohedral symmetry was prepared by a simple thermal treatment method.Heat treatment was conducted using an electric cylinder furnace in an air atmosphere at temperatures between 773 and 923K, where the produced chromium-ironoxide nanoparticles had different crystallite sizes ranging from 9 to 20nm. The products were well characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscope (FESEM), X-ray analysis (EDXA), and Fourier transform infrared spectroscopy (FT-IR). The samples demonstrated a magnetic behavior with unpaired electron spins, which was confirmed by using vibrating sample magnetometer (VSM) and electron paramagnetic resonance (EPR) spectroscopy. •An aqueous solution of PVA and metal nitrates consist of Fe (NO3)3·9H2O and Cr (NO3)3·9H2O was prepared at 353K•The mixed solution was heated at 373K to evaporate the water and the resulting solid was crushed to powder•The influence of calcination temperature on structure and magnetic properties of a novel chromium-iron oxide (Cr2Fe6O12) nanoparticle was characterized