中国物理B ›› 2014, Vol. 23 ›› Issue (8): 83301-083301.doi: 10.1088/1674-1056/23/8/083301

• SPECIAL TOPI—International Conference on Nanoscience & Technology, China 2013 • 上一篇    下一篇

Electromagnetic wave absorbing properties and hyperfine interactions of Fe-Cu-Nb-Si-B nanocomposites

韩满贵a, 郭韦a, 吴燕辉a, 刘明b, Magundappa L. Hadimanic   

  1. a State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China;
    b Analytical and Testing Center, Sichuan University, Chengdu 610064, China;
    c Department of Electrical and Computer Engineering, Iowa State University, Ames, IA 50011, USA
  • 收稿日期:2013-09-04 修回日期:2013-12-15 出版日期:2014-08-15 发布日期:2014-08-15
  • 基金资助:
    Project supported by the Research Fund for International Young Scientists of the National Natural Science Foundation of China (Grant No. 61250110544), the National Natural Science Foundation of China (Grant No. 61271039), the Scientific Foundation of Young Scientists in Sichuan Province, China (Grant No. 2012JQ0053), and the Program for New Century Excellent Talents in Universities, China (Grant No. NCET-11-0060).

Electromagnetic wave absorbing properties and hyperfine interactions of Fe-Cu-Nb-Si-B nanocomposites

Han Man-Gui (韩满贵)a, Guo Wei (郭韦)a, Wu Yan-Hui (吴燕辉)a, Liu Min (刘明)b, Magundappa L. Hadimanic   

  1. a State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China;
    b Analytical and Testing Center, Sichuan University, Chengdu 610064, China;
    c Department of Electrical and Computer Engineering, Iowa State University, Ames, IA 50011, USA
  • Received:2013-09-04 Revised:2013-12-15 Online:2014-08-15 Published:2014-08-15
  • Contact: Han Man-Gui E-mail:mangui@gmail.com
  • Supported by:
    Project supported by the Research Fund for International Young Scientists of the National Natural Science Foundation of China (Grant No. 61250110544), the National Natural Science Foundation of China (Grant No. 61271039), the Scientific Foundation of Young Scientists in Sichuan Province, China (Grant No. 2012JQ0053), and the Program for New Century Excellent Talents in Universities, China (Grant No. NCET-11-0060).

摘要: The Fe-Cu-Nb-Si-B alloy nanocomposite containing two ferromagnetic phases (amorphous phase and nanophase phase) is obtained by properly annealing the as-prepared alloys. High resolution transmission electron microscopy (HR-TEM) images show the coexistence of these two phases. It is found that Fe-Si nanograins are surrounded by the retained amorphous ferromagnetic phase. Mössbauer spectroscopy measurements show that the nanophase is the D03 -type Fe-Si phase, which is employed to find the atomic fractions of resonant 57Fe atoms in these two phases. The microwave permittivity and permeability spectra of Fe-Cu-Nb-Si-B nanocomposite are measured in the frequency range of 0.5 GHz-10 GHz. Large relative microwave permeability values are obtained. The results show that the absorber containing the nanocomposite flakes with a volume fraction of 28.59% exhibits good microwave absorption properties. The reflection loss of the absorber is less than -10 dB in a frequency band of 1.93 GHz-3.20 GHz.

关键词: Mö, ssbauer spectroscopy, magnetic permeability, nanocrystalline alloys

Abstract: The Fe-Cu-Nb-Si-B alloy nanocomposite containing two ferromagnetic phases (amorphous phase and nanophase phase) is obtained by properly annealing the as-prepared alloys. High resolution transmission electron microscopy (HR-TEM) images show the coexistence of these two phases. It is found that Fe-Si nanograins are surrounded by the retained amorphous ferromagnetic phase. Mössbauer spectroscopy measurements show that the nanophase is the D03 -type Fe-Si phase, which is employed to find the atomic fractions of resonant 57Fe atoms in these two phases. The microwave permittivity and permeability spectra of Fe-Cu-Nb-Si-B nanocomposite are measured in the frequency range of 0.5 GHz-10 GHz. Large relative microwave permeability values are obtained. The results show that the absorber containing the nanocomposite flakes with a volume fraction of 28.59% exhibits good microwave absorption properties. The reflection loss of the absorber is less than -10 dB in a frequency band of 1.93 GHz-3.20 GHz.

Key words: Mössbauer spectroscopy, magnetic permeability, nanocrystalline alloys

中图分类号:  (M?ssbauer spectra)

  • 33.45.+x
75.50.Bb (Fe and its alloys)