Negative imaginary parts of complex permeability and microwave absorption performance of core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanocomposites

doi:10.1039/c6ra12772j

IMR OpenIR

	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
通讯作者	Li, D.(dali@imr.ac.cn) ; He, J.(hejun@cisri.com.cn)
	2016
发表期刊	RSC ADVANCES
ISSN	2046-2069
卷号	6 期号:77 页码:73020-73027
摘要	Cactus-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.
资助者	National Natural Science Foundation of China ; National Basic Research Program of China, Ministry of Science and Technology China
DOI	10.1039/c6ra12772j
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000381490100018
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/122923
专题	中国科学院金属研究所
通讯作者	Li, D.; He, J.
作者单位	1.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
推荐引用方式 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.