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
韩满贵a, 郭韦a, 吴燕辉a, 刘明b, Magundappa L. Hadimanic
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
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.
中图分类号: (M?ssbauer spectra)