Adjustable microwave absorption properties of flake shaped (Ni0.5Zn0.5)Fe2O4/Co nanocomposites with stress induced orientation

被引：13

作者：

Yan, Xu ^{[1
]}

Gao, Daqiang ^{[1
]}

Chai, Guozhi ^{[1
]}

Xue, Desheng ^{[1
]}

机构：

[1] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 11期

关键词：

Ni-Zn ferrite; Cobalt; Nanocomposite; Adjustable microwave absorption; Flake shape; ABSORBING PROPERTIES; PERMEABILITY; FREQUENCIES; COMPOSITES; PARTICLES;

D O I：

10.1016/j.jmmm.2012.01.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Flake shaped (Ni0.5Zn0.5)Fe2O4/Co nanocomposites were successfully fabricated by co-precipitating of Ni-Zn ferrite on the surface of cobalt nanoflakes. The electromagnetic characteristics of the samples were studied at the frequency of 0.1-14 GHz. The results showed that the cobalt nanoflakes in compacted nanocomposites were well orientated, and the nanocomposites were characterized with low optimal reflection loss (RL) of -33.8 dB at 11.5 GHz and broad RL bandwidth for < -20 dB in the frequency range of 7.6-12.1 GHz. At the same time, the position of the absorptive band can be adjusted by changing the mass ratio of ferrite to cobalt in the nanocomposites. It is proposed that the excellent microwave absorption properties are related to the combination of strong shape anisotropy of cobalt nanoflakes and adjustable dielectric loss. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1902 / 1906

页数：5

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