期刊
APPLIED PHYSICS LETTERS
卷 102, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4809675
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资金
- National Natural Science Foundation of China [50901078, 51171185]
- National Basic Research Program of China [2012CB933103]
- Ministry of Science and Technology China
- IMR graduate-student creative-research project
Dual dielectric relaxation of the permittivity and multiple magnetic resonances of the permeability (including one natural resonance and two exchange resonance modes) are observed in CoNi@C nanocapsules in the same 5-17GHz frequency range which leads to a better electromagnetic-wave absorption than earlier reported for nanocomposites. A reflection loss (RL) exceeding -25 dB is obtained in a wide frequency range of 5-17 GHz when an appropriate absorber thickness between 2 and 4.8mm is chosen. For a 2mm absorber layer, a RL value exceeding -10 dB is achieved in the broad frequency range 12-18 GHz, which covers the whole K-u-band. (C) 2013 AIP Publishing LLC.
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