Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8158073 | Journal of Magnetism and Magnetic Materials | 2013 | 6 Pages |
Abstract
This work discusses the changes in the structural, magnetic and magnetoelastic properties of CoxFe3âxO4 (x=1.0 to 2.0) due to variations in cation concentration and the presence of a secondary Co1âyFeyO phase. Non-stoichiometric cobalt ferrite samples used in this study were prepared via the ceramic method. Samples with x>1 possess two phases; a secondary rock salt Co1âyFeyO phase and a spinel cobalt ferrite phase with varying cation concentration. The sample x=1 has only the spinel phase. Increase in Co concentration resulted in a decrease in magnetization but an increase in coercivity. Magnetostrictive properties and magnetocrystalline anisotropy were also affected by deviation from stoichiometric composition. Results are discussed on the basis of the coexistence of Co3+, Co2+ and Fe3+ in the spinel lattice of the samples and the influence of the secondary Co1âyFeyO phase on the overall properties.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
I.C. Nlebedim, A.J. Moses, D.C. Jiles,