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Microwave permeability change of FeCo nanocrystalline during high energy ball milling

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Abstract

The microwave magnetic properties of the ball milled FeCo particles were investigated as functions of ball milling time (t) using microwave electromagnetic parameters analysis techniques. The results show that the imaginary part of intrinsic dynamic permeability (μi) of the ball-milled particles is much bigger than that of raw powders. μi strongly depends on t and exhibits several slightly damped ferromagnetic resonances. These phenomena are in qualitative agreement with the formation of the corresponding microstructure or the Aharoni s model of non-uniform exchange resonance modes. The present microwave permeability behavior indicates that nanocrystalline materials with the same grain size may exhibit different properties that depend upon the microstructure, which provides a possibility for manufacturing high performance microwave absorber.

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Authors and Affiliations

  1. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070, Wuhan, China

    Wang Wei Ph D, Guan Jianguo Ph D, Zhao Suling & Zhang Qiaoxin

Authors
  1. Wang Wei Ph D
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  2. Guan Jianguo Ph D
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  3. Zhao Suling
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  4. Zhang Qiaoxin
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Correspondence to Guan Jianguo Ph D.

Additional information

Funded by the 863 High Technology Research Project (No. 2001AA339020 and 2002AA305302) from the Ministry of Science and Technology of China, and the Excellent Young Teachers Program of M0E(2002[350]), China

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Wei, W., Jianguo, G., Suling, Z. et al. Microwave permeability change of FeCo nanocrystalline during high energy ball milling. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 21, 16–18 (2006). https://doi.org/10.1007/BF02861460

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  • DOI: https://doi.org/10.1007/BF02861460

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