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Solution synthesis and novel magnetic properties of ball-chain iron nanofibers

Published online by Cambridge University Press:  03 October 2011

Guoxiu Tong ,
Wenhua Wu ,
Jianguo Guan ,
Jianping Wang ,
Ji Ma ,
Jinhao Yuan  and
Sunli Wang
Guoxiu Tong*
Affiliation:
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
Wenhua Wu
Affiliation:
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
Jianguo Guan*
Affiliation:
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
Jianping Wang
Affiliation:
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
Ji Ma
Affiliation:
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
Jinhao Yuan
Affiliation:
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
Sunli Wang
Affiliation:
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
*
a)Address all correspondence to these authors. e-mail: tonggx@zjnu.cn
b)e-mail: guanjg@whut.edu.cn
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Abstract

The current work describes the simple solution process of ball-chain polycrystalline Fe nanofibers with aspect ratios (λ) and diameters (D) of over 1−65 and 30−95 nm. Static magnetic and microwave electromagnetic property studies demonstrated that such properties strongly depend on the λ and D of the Fe nanofibers. As the λ and D increase, the U-shape of the saturation magnetization (Ms) reaches a maximum of 180.0 emu·g−1, owing to the cooperative action of nanoeffects and magnetic interactions, whereas the coercivity (Hc) gradually increases due to aspect ratio variations. In contrast, the change in trends of the permittivity (ε′, ε″) and the dielectric loss (tgδE) are represented as an inverted U-shape; the permeability (μ′, μ″) and magnetic loss (tgδM) increase at low-frequency ranges and decrease at high frequency ranges. Stronger absorption and broader bandwidths of Fe nanofibers compared with Fe nanoparticles are ascribed to higher dielectric losses. The prepared Fe nanofibers have high potential in light-weight and broad bandwidth microwave absorbing applications.

Keywords

Dielectric propertiesFeMagnetic properties
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 20 , 28 October 2011 , pp. 2590 - 2598
Copyright
Copyright © Materials Research Society 2011

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References

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