Abstract To explore the mechanism of carbonyl iron flake composites for microwave complex permeability, this paper investigates the feature of the flakes. The shape anisotropy was certified by the results of the magnetization hysteresis loops and the Mössbauer spectra. Furthermore, the shape anisotropy was used to explain the origin of composite microwave performance, and the calculated results agree with the experiment. It is believed that the shape anisotropy dominates microwave complex permeability, and the natural resonance plays main role in flake.
Received: 11 November 2007
Revised: 03 December 2007
Accepted manuscript online:
PACS:
75.60.Ej
(Magnetization curves, hysteresis, Barkhausen and related effects)
Fund: Project supported
by the National Natural Science Foundation of China (Grant Nos
90505007 and 10774061).
Cite this article:
Wen Fu-Sheng(温福昇), Qiao Liang(乔亮), Zhou Dong(周栋), Zuo Wen-Liang(左文亮), Yi Hai-Bo(伊海波), and Li Fa-Shen (李发伸) Influence of shape anisotropy on microwave complex permeability in carbonyl iron flakes/epoxy resin composites 2008 Chin. Phys. B 17 2263
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