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Negative imaginary parts of complex permeability and microwave absorption performance of core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanocomposites
Li, D.1; Feng, Y.1; Pan, D. S.1; Jiang, L. W.1; Dai, Z. M.1; Li, S. J.1; Wang, Y.2; He, J.2; Liu, W.1; Zhang, Z. D.1
Corresponding AuthorLi, D.(dali@imr.ac.cn) ; He, J.(hejun@cisri.com.cn)
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:77Pages:73020-73027
AbstractCactus-shaped core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanostructures with a spiky surface were prepared by combining an arc-discharge process with a high-temperature solution chemical method, in which FeCo nanoparticles serve as the, while carbon and ferrimagnetic Fe2.5Cr0.5Se4 (FCS) are the inside and the outside shells, respectively. The magnetic properties, electromagnetic response, and microwave absorption properties of the (x) FeCo/C/FCS nanocomposites in the 1-18 GHz frequency range were investigated by changing the mass ratio x between FeCo/C and FCS. The frequency dependences of mu '' (imaginary parts of complex permeability) and epsilon '' (imaginary parts of complex permittivity) of the (0 <= x <= 0.15) FeCo/C/FCS nanocomposites show distinct inverse trends of change in the high frequency ranges. Negative minimum values of mu '' are found to be coupled with positive maxima of 300 due to a phase lag. The bare FCS-paraffin composite starts with a minimum mu '' of about -0.07, which shifts to -0.44 and -0.05 when the mass ratio x is increased to 0.1 and 0.15, respectively. As x increases to 0.2, all the mu '' values of the nanocomposites become positive. The best absorption property with a reflection loss (RL) peak of -54.5 dB at 10 GHz is obtained in the (x = 0.1) FeCo/C/FCS-paraffin composite and RL exceeding -20 dB can be achieved within the 3-18 GHz frequency range by choosing an appropriate layer thickness between 1.4 and 6 mm. The contribution of the negative mu '' response to the microwave absorption is discussed.
Funding OrganizationNational Natural Science Foundation of China ; National Basic Research Program of China, Ministry of Science and Technology China
DOI10.1039/c6ra12772j
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51331006] ; National Natural Science Foundation of China[51171185] ; National Natural Science Foundation of China[51371175] ; National Natural Science Foundation of China[51371055] ; National Basic Research Program of China, Ministry of Science and Technology China[2012CB933103]
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000381490100018
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/122923
Collection中国科学院金属研究所
Corresponding AuthorLi, D.; He, J.
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Cent Iron & Steel Res Inst, Div Funct Mat, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Li, D.,Feng, Y.,Pan, D. S.,et al. Negative imaginary parts of complex permeability and microwave absorption performance of core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanocomposites[J]. RSC ADVANCES,2016,6(77):73020-73027.
APA Li, D..,Feng, Y..,Pan, D. S..,Jiang, L. W..,Dai, Z. M..,...&Zhang, Z. D..(2016).Negative imaginary parts of complex permeability and microwave absorption performance of core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanocomposites.RSC ADVANCES,6(77),73020-73027.
MLA Li, D.,et al."Negative imaginary parts of complex permeability and microwave absorption performance of core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanocomposites".RSC ADVANCES 6.77(2016):73020-73027.
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