| Original Articles |
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Calculation of High Frequency Complex Permeability of Carbonyl Iron Flakes in a Nomagnetic Matrix |
WEN Fu-Sheng;QIAO Liang;YI Hai-Bo;ZHOU Dong;LI Fa-Shen |
| Institute of Applied Magnetics, Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000 |
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| Cite this article: |
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WEN Fu-Sheng, QIAO Liang, YI Hai-Bo et al 2008 Chin. Phys. Lett. 25 751-754 |
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Abstract The carbonyl iron flakes are fabricated by high-energy ball milling. The effective permeability is measured and calculated for the composite consisting of flakes embedded in a nonmagnetic matrix. The magnetic flakes with a shape anisotropy and random spatial distribution of normal direction are
considered to calculate the complex permeability of magnetic flake materials. Its analytical model is derived from the Landau--Lifshitz--Gilbert equation and Bruggeman's effective medium theory. The calculated results agree well with the experiment.
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| Keywords:
84.40.-x
75.40.Gb
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Received: 28 August 2007
Published: 30 January 2008
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| PACS: |
84.40.-x
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(Radiowave and microwave (including millimeter wave) technology)
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75.40.Gb
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(Dynamic properties?)
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