8-12 July 2013
Structural and Magnetic Properties of MgxSrxMnxCo1-3xFe2O4 Nanoparticle ferrites
Presented by Mr. Nadir OSMAN on 10 Jul 2013 from 09:20 to 09:40
Type: Oral Presentation
Track: Track A - Division for Condensed Matter Physics and Materials
A series of nanoferrites (with = 0, 0.1, 0.2, 0.3, 1/3) were synthesized by glycol-thermal technique. X-ray diffraction (XRD) patterns of the as-prepared samples show single-phase cubic spinel structure. The average crystallite sizes, lattice parameters, XRD densities and porosities were estimated from XRD data. The average crystallite sizes were found in range of 7 to 9 nm. Mössbauer spectroscopy measurements were performed in order to investigate the magnetic order of the materials and the distribution of Fe3+ ions in the tetrahedral and octahedral sites. Room temperature magnetic measurements of the series were studied using a vibrating sample magnetometer. The results show that the values of the coercive fields and saturation magnetizations which increase with increase in Co content from 15 Oe and 56.51 emu/g for x=0.3 to 114 Oe and 76.61 emu/g for x= 0.1 respectively. Significant correlations between magnetizations and coercive fields are observed. A significant change in properties is observed for the compound. These results are contrasted with low temperature measurements from 2 K to 300 K and magnetic fields to 5 Tesla.
T. Moyo; firstname.lastname@example.org; School of Chemistry and Physics, University of KwaZulu-Natal