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- W3094110670 abstract "We present the synthesis and characterization of magnetite-maghemite nanoparticles obtained by mechanical milling of sub micrometric hematite in presence of polyethylene glycol (PEG) as stabilizing medium. Nanoparticles were obtained in a milling time of 24 h, being their aggregation and particle size distribution less than those obtained by us in a previous work employing a mixture of hematite and deionized water as precursor material. X-ray and room temperature Mössbauer measurements confirmed that milling products are composed only by the phases magnetite-maghemite. TEM micrographs showed quasi-spherical particles with low aggregation and mean diameter around 14 nm. Room temperature magnetization loops are consistent with ferrimagnetic multi domain nanoparticles, with saturation magnetization around 62 A m2 kg−1 and coercive field around 10.2 kA m−1. The results suggest that mechanical milling in presence of polyethylene glycol is a simple and efficient route to produce magnetite-maghemite nanoparticles with good magnetization, which can be useful for applications in nanotechnology." @default.
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- W3094110670 date "2021-01-01" @default.
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- W3094110670 title "Synthesis and characterization of magnetite-maghemite nanoparticles in presence of polyethylene glycol obtained by mechanical milling" @default.
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- W3094110670 doi "https://doi.org/10.1016/j.mseb.2020.114873" @default.
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