Synthesis and magnetic properties of concentrated α-Fe2O3 nanoparticles in a silica matrix

作者: Marin Tadić , Dragana Marković , Vojislav Spasojević , Vladan Kusigerski , Maja Remškar

DOI: 10.1016/J.JALLCOM.2006.09.099

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摘要: Hematite nanoparticles in a silica matrix containing 30wt.% of hematite were synthesized by the sol–gel method. Transmission electron microscopy studies showed that the average particle size of the hematite was about 4nm with a narrow size distribution, while selected area electron diffraction confirmed the formation of the hematite phase. Investigation of the magnetic properties by DC magnetization and AC susceptibility measurements indicated behavior typical of a superparamagnetic system, such as the existence and frequency …

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