Journal
MATERIALS RESEARCH EXPRESS
Volume 6, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/ab1561
Keywords
FeCo@C core-shell nanoparticles; permittivity; permeability; impedance matching; microwave absorption
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Funding
- National Natural Science Foundation of China [51564037, 51401103]
- PhD start-up foundation [3401223239]
- Jiangxi University of Science and Technology
- Science and Technology Research Project of Jiangxi Department of Education [GJJ170500, GJJ170535]
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In this paper, FeCo and FeCo@C nanoparticles are synthesized by using plasma arc-discharging technology. FeCo@C nanoparticles are fabricated by particularly applying methane as a carbon source in the plasma arc-discharging facility. The influences of core-shell nanostructure on magnetic and absorbing properties are investigated. Compared with FeCo nanoparticles, FeCo@C nanoparticles in a typical core-shell structure exhibit lower saturation magnetization, excellent impedance matching and reflection loss (RL) in the GHz frequency range. The optimal RL of -16.8 dB is obtained at 9.9 GHz with the absorber thickness of 3.0 mm. The excellent microwave absorption is attributed to the effective complementarities between dielectric loss and magnetic loss in FeCo@C core-shell nanoparticles.
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