Static and Dynamic Magnetic Properties of Ferromagnetic Cobalt Particles Containing Nanoscale Subunits

In this work, cobalt micro-particles containing various nanoscale subunits were hydro- thermally synthesized and controlled by the content of sodium tartrate in reaction solution. Both the static and dynamic magnetization properties of cobalt particles changes accordingly. As the content of sodium t...

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Bibliographic Details
Published in:Procedia engineering 2017, Vol.216, p.66-70
Main Authors: Li, Wenxin, Zhou, Peiheng, Luo, Xiaojia, Hou, Jianhua, Jiang, Jiagen
Format: Article
Language:English
Subjects:
ferromagnetic metal particles
hydro- thermal synthesis
magnetic loss tangential
microwave permeability spectrum
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Summary:In this work, cobalt micro-particles containing various nanoscale subunits were hydro- thermally synthesized and controlled by the content of sodium tartrate in reaction solution. Both the static and dynamic magnetization properties of cobalt particles changes accordingly. As the content of sodium tartrate varies from 0 g, 0.552 g to 4.416 g, subunits of the cobalt particles shrinks from dendrites, coralloids to small bumps, saturation magnetization changes from 122.5 emu/g, 86.5 emu/g, to 95.79 emu/g, and the coercive force reduces from 195 Oe, 148 Oe, to 62 Oe. Consequently, ferromagnetic resonance bandwidth of the cobalt particles decreases due to the diminishing surface scatterers (subunits), whereas low frequency loss tangential increases following the growth of spherical particle core. The proposed cobalt particles with nanoscale subunits shows potential for electromagnetic wave absorption and shielding application.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2017.09.826