Effect of annealing temperature on the magnetic properties of CoFe₂O₄ nanoparticles

摘要

Nanocrystalline CoFe₂O₄ samples were prepared using the flash technique and annealed at different temperatures. X-ray diffraction results indicate a single-phase spinel structure. The saturation and remanent magnetization of the samples have been determined as a function of the crystallite size. An exponential decay of the coercive field with crystallite size is observed. After annealing, one of the samples at 950°C, 40 nm particles were obtained with a saturation magnetization of 64.36 emu/g, a coercivity of 396 Oe and the highest density among all the samples.View full textDownload full textKeywordsnanostructures, magnetically ordered materials, CoFe2O4 , flash method, saturation magnetization, coercivityRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/09500831003630732