Abstract The amorphous FeCuNbSiB microwires are fabricated by using the melt extraction method and annealed separately at temperatures T = 573, 673, 723 and 773K for 1h. The effect of annealing treatment on the microwave electromagnetic properties of FeCuNbSiB wires/wax composites has been investigated for the first time. It is found that in a frequency range of 0.5--4.0GHz, the complex permittivity, permeability, magnetic and electric loss tangents of FeCuNbSiB wires/wax composites are strongly dependent on the annealing temperature and frequency. For T = 573, 723 and 773K, two resonance peaks are found at frequency f = 1.2 and 3.3GHz. However, for T = 673K, only one resonance peak occurs at f = 3.3GHz. The resonance peak at f = 1.2GHz is believed to be due to the stress-induced anisotropy, while the resonance peak at f = 3.3GHz is attributed to the random anisotropy.
Received: 10 April 2006
Revised: 03 August 2006
Accepted manuscript online:
PACS:
75.60.Nt
(Magnetic annealing and temperature-hysteresis effects)
(Magnetization curves, hysteresis, Barkhausen and related effects)
Fund: Project supported by the Key Foundation of Science for the Young Scholars in University of Electronic Science and Technology of China (Grant No L08010301JX05013).
Cite this article:
Liang Di-Fei(梁迪飞), Han Man-Gui(韩满贵), Yan Bo(鄢波), and Deng Long-Jiang(邓龙江) Effect of annealing treatments on the microwave electromagnetic properties of amorphous FeCuNbSiB microwires 2007 Chinese Physics 16 542
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