Cation Distributions and Magnetic Properties of Cu-Doped Nanosized MnFe2O4 Synthesized by the Coprecipitation Method

• Published in: IEEE transactions on magnetics 2018-01, Vol.54 (1), p.1-5
• Main Authors: Khaleghi, M., Moradmard, H., Shayesteh, S. Farjami
• Format: Article
• Language: English
• Subjects: Cation distributions; Cations; Copper; Coprecipitation; coprecipitation method; Crystallites; Ferrites; Ferromagnetism; Fourier transforms; Iron; Lattices; Magnetic moments; magnetic nanoparticles; Magnetic properties; Magnetic saturation; Magnetism; Manganese; Nanoparticles; Occupancy; Parameters; Rietveld method; Saturation magnetization; Scanning electron microscopy; spinel ferrites; Synthesis; X ray analysis; X-ray diffraction; X-ray scattering
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2017.2761320

Cu 2+ substituted manganese ferrite nanoparticles (Cu x Mn 1-x Fe 2 O 4 , x = 0, 0.3, 0.5) were prepared using the Coprecipitation method. The effects of Cu 2+ doped on the structure and the magnetic properties of the products were characterized by X-ray diffraction (XRD), Fourier transform infrared, and vibrating sample magnetometer (VSM), respectively. The scanning electron microscopy and energy dispersive X-ray analysis were carried to the morphological assessment and the percentage of Cu/Mn values. The crystallite size of the samples is in the range of ~35-42 nm, and the lattice parameter is decreased from 8.50 to 8.394 °A with Cu 2+ content. Cation distribution and structural parameters of the synthesized powder were determined by Rietveld analysis of the XRD data. Room temperature VSM measurements show that the products have a ferromagnetic behavior with the saturation magnetization (M s ) values in the range of ~42-30 emu/g. The results showed that the decrease of M s with increasing the copper concentration can be attributed to the influence of the occupancy in the specific sites and the difference in the magnetic moment of Cu 2+ and Fe 3+ .