Synthesis and characterization of manganese ferrite nanoparticles by thermal treatment method

• Published in: Journal of magnetism and magnetic materials 2011-07, Vol.323 (13), p.1745-1749
• Main Authors: Goodarz Naseri, M., Saion, E. Bin, Ahangar, H. Abbastabar, Hashim, M., Shaari, A.H.
• Format: Article
• Language: English
• Subjects: Band spectra; Bands; Calcination; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Diamagnetism, paramagnetism and superparamagnetism; Electron paramagnetic resonance; Exact sciences and technology; Ferrite; Magnetic properties; Magnetic properties and materials; Magnetic properties of nanostructures; Magnetic property; Manganese; Manganese ferrite; Nanoparticle; Nanoparticles; Physics; Thermal treatment; Transmission electron microscopy
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2011.01.016

Cubic structured manganese ferrite nanoparticles were synthesized by a thermal treatment method followed by calcination at various temperatures from 723 to 873K. In this investigation, we used polyvinyl pyrrolidon (PVP) as a capping agent to control the agglomeration of the nanoparticles. The characterization studies were conducted by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The average particle sizes of manganese ferrite nanoparticles were determined by TEM, which increased with the calcination temperature from 12 to 22nm and they had good agreement with XRD results. Fourier transform infrared spectroscopy confirmed the presence of metal oxide bands at all temperatures and the absence of organic bands at 873K. Magnetic properties were demonstrated by a vibrating sample magnetometer, which showed a super-paramagnetic behavior for all samples and also saturation magnetization (Ms) increases from 3.06 to 15.78emu/g by increasing the calcination temperature. The magnetic properties were also confirmed by the use of electron paramagnetic resonance spectroscopy, which revealed the existence of unpaired electrons and also measured peak-to-peak line width, resonant magnetic field and the g-factor. ► Cubic structured manganese ferrite nano particles were synthesized by a thermal treatment method. ► Polyvinylpyrrolidon (PVP) has been used as a capping agent to control the agglomeration of the nanoparticles. ► The average particle sizes of manganese ferrite nano particles were determined by TEM.