Evaluation of tailored magnetic composite films for near-field electromagnetic noise suppression

Title
Evaluation of tailored magnetic composite films for near-field electromagnetic noise suppression
Author(s)
김기현남백일이준식좌용호[좌용호]오승탁[오승탁]이상관[이상관]
Keywords
COPLANAR TRANSMISSION-LINE; THIN-FILMS; RANGE; PERMEABILITY
Issue Date
201011
Publisher
SPRINGER
Citation
RESEARCH ON CHEMICAL INTERMEDIATES, v.36, no.6-7, pp.827 - 834
Abstract
The effects of permeability and permittivity of the magnetic nanorods filled in composite films have been studied in the broadband radio-frequency range from 0.5 to 10 GHz on a microstrip line. The transmission power absorption of the composite film on a microstrip line was simulated using 3D FEM HFSS program. The model of microstrip line was designed based on IEC standard (IEC 62333-2). The permeability of composite film with magnetic nanorods could be controlled by the aspect ratio of nanorods. The ferromagnetic resonance frequency and the relative complex permeability with the change of aspect ratio were calculated by the Landau-Lifshitz-Gilbert equation. Given the bulk magnetization of 5 kG, the power loss frequency region has exhibited the 2.5-7 GHz broadband frequency by mixing of nanorods with various aspect ratios from 2 to 10. The permittivity effects have been evaluated by changing the real part of permittivity with a fixed imaginary part value and vice versa. The power losses were increased with the proportional to the imaginary part of permittivity and did not show any significant change with the increment of the real part of permittivity. The conduction electromagnetic noise in near field can be suppressed by controlling complex permeability with various aspect ratios of the magnetic nanorods in the composite.
URI
http://hdl.handle.net/YU.REPOSITORY/23406http://dx.doi.org/10.1007/s11164-010-0187-5
ISSN
0922-6168
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이과대학 > 물리학과 > Articles
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