The crossover effect from multi- to single-domain particles on the magnetic properties of CuxNi1-xFe2O4 oxides due to grain size reduction to nanometre scale is investigated. The properties of the bulk and nanosized oxide have been studied by x-ray diffraction, Mössbauer spectroscopy and magnetization measurements. The Mössbauer spectra for milled nanosized powders show a combination of ferrimagnetic and paramagnetic behaviour. The coercive fields is found to increase with reduction in grain size for multi-domain particles. For single-domain particles, is observed to decrease with decrease in grain size.
Journal: TechConnect Briefs
Volume: 4, Technical Proceedings of the 2007 NSTI Nanotechnology Conference and Trade Show, Volume 4
Published: May 20, 2007
Pages: 397 - 400
Industry sector: Advanced Materials & Manufacturing
Topics: Nanoparticle Synthesis & Applications