DocumentCode
64493
Title
Microwave Permeability and Mössbauer Spectra of Flaky Fe–Si–Al Particles
Author
Mangui Han ; Difei Liang ; Rozanov, Konstantin N. ; Longjiang Deng
Author_Institution
State Key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Volume
49
Issue
3
fYear
2013
fDate
Mar-13
Firstpage
982
Lastpage
985
Abstract
Fe84.94Si9.68Al5.38 flaky particles have been obtained by ball attrition method. The volume fraction dependence of microwave permeability has been measured for composites filled with these particles. Effective medium theories have been employed to extract the apparent microwave permeability. It is found that the flaky Fe-Si-Al particles have large apparent microwave permeability and large microwave magnetic loss. For example, at 0.5 GHz, the real and imaginary parts of apparent permeability are 10 and 5, respectively. The extracted microwave permeability is found to be consistent with generalized Snoek´s limit. Due to high microwave magnetic loss, the flaky Fe-Si-Al particles can be useful for technical applications in the field of electromagnetic compatibility. Mössbauer spectroscopy measurements show that the hyperfine magnetic field and isomer shift have wide distribution, indicating that Fe atoms in the flaky Fe-Si-Al alloys have complicated environments.
Keywords
Mossbauer effect; aluminium alloys; composite materials; eddy current losses; hyperfine interactions; iron alloys; isomer shift; magnetic leakage; magnetic particles; magnetic permeability; silicon alloys; Fe atoms; Fe84.94Si9.68Al5.38; Mossbauer spectra; Mossbauer spectroscopy measurements; apparent microwave permeability; ball attrition method; complicated environments; effective medium theories; electromagnetic compatibility; flaky Fe-Si-Al alloys; flaky Fe-Si-Al particles; frequency 0.5 GHz; generalized Snoek´s limit; hyperfine magnetic field; isomer shift; microwave magnetic loss; volume fraction dependence; Frequency measurement; Magnetic resonance imaging; Microwave measurements; Microwave theory and techniques; Permeability; Permittivity; Permittivity measurement; Electromagnetic composites; Mössbauer spectroscopy; Sendust alloy; microwave permeability;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2012.2227690
Filename
6466533
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