Detailed magnetic characteristics of cobalt ferrite (Co x Fe 3-x O 4 ) nanoparticles synthesized in the presence of PVP surfactant
作者： M Almasi Kashi , S Alikhanzadeh-Arani , E Bagherian Jebeli , AH Montazer , None
DOI: 10.1007/S00339-020-3427-6
关键词:
摘要: While Co ferrite nanoparticles (NPs) have been widely considered for potential applications in magnetic storage, photocatalysts, and hyperthermia, significantly less attention has paid to explore their detailed characteristics as a function of the content. Herein, hydrothermal method was successfully used preparation CoxFe3−xO4 (0.5 ≤ x ≤ 2) NPs, employing stable ferric cobalt salts with PVP surfactant capping agent. Hysteresis loop measurements showed maximum coercivity (Hc) saturation magnetization (Ms) 982 Oe 46 emu/g Co0.5Fe2.5O4 CoFe2O4 compounds, respectively. Detailed resulting NPs different morphologies ranging from nanocubes dense nanospheres were comprehensively investigated by first-order reversal curve analysis. It found that (0.5 ≤ x < 1) both spinel hematite phases comprise noticeable hard soft phases, whereas superparamagnetic phase starts dominate behavior (1 ≤ x ≤ 2) reduced grain size pure phase.
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