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Magnetic And Electromagnetic Properties Of Fe3O4/C Self-assemblies

F. Xiao, C. Feng, Chuangui Jin, X. Liu, L. Pan, Ailin Xia
Published 2014 · Materials Science

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Abstract Fe3O4/C self-assembled rod-like nanostructures with average diameter of 10 nm and length of 200 nm have been synthesized by the hydrothermal method. Fe3O4/C rod-like nanostructures were self-assembled by Fe3O4/C nanoparticles. The saturation magnetization of Fe3O4/C self-assemblies is 41.7 emu/g. Compared to Fe3O4 nanoparticles, the higher dielectric loss of Fe3O4/C self-assemblies is ascribed to the amorphous carbon layer. Due to the existence of carbon layer on Fe3O4, the real part of permeability of Fe3O4/C self-assemblies is higher than that of Fe3O4 nanoparticles at 2–16 GHz. Two overlapped peaks of imaginary part of permeability in Fe3O4/C self-assemblies are from the natural and exchange resonance.
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