Open AccessMorphologic, structural, and magnetic characterization of cobalt ferrite nanoparticles synthesized at different temperatures
Author(s) -
Kétlin Santos Alberton,
Liza Bruna Reis Monteiro,
Anne Beatriz Ramos Moraes,
Raynara Vitória dos Santos Paiva Bucar,
Maicon Maciel Ferreira de Araujo,
Moacy José Stoffes,
Cléver Reis Stein
Publication year - 2021
Language(s) - English
Resource type - Journals
ISSN - 2411-2933
DOI - 10.31686/ijier.vol9.iss9.3355
Subject(s) - superparamagnetism , spinel , brillouin and langevin functions , magnetization , materials science , transmission electron microscopy , cobalt , ferrite (magnet) , coprecipitation , magnetic moment , analytical chemistry (journal) , nanoparticle , nuclear magnetic resonance , nanotechnology , condensed matter physics , metallurgy , chemistry , magnetic field , inorganic chemistry , composite material , physics , chromatography , quantum mechanics
In this study we report on the synthesis and characterization of cobalt ferrite (CoFe2O4) nanoparticles (NPs), synthesized by chemical co-precipitation in alkaline medium. Two samples were synthesized at two different temperatures, 35 and 90 oC. Both samples were characterized by Transmission Electron Microscopy (TEM), x-ray diffraction (XRD), and room-temperature (RT) magnetization. Two samples showed superparamagnetic behavior (SPM) at RT. TEM reveals morphological mean diameter increasing 5.8 nm to 10.4 nm, with the increase of the co-precipitation temperature. XRD confirm the inverse cubic spinel structure. The RT magnetization curves were analyzed by the first-order Langevin function averaged out by a lognormal distribution function of magnetic moments. This analysis showed saturation magnetization and magnetic moment increases from 60.2 to 74.8 emu/g and from 3.9 x 103 to 8.2 x 103 mB, respectively.