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使用电化学脉冲沉积法制备了磁晶各向异性易磁化方向(c轴)垂直纳米线长轴方向的钴纳米线.受到磁晶各向异性、静磁相互作用等因素与形状各向异性相互竞争的结果,纳米线阵列的磁滞回线显示出较弱的磁各向异性.此外,在2—18GHz频率范围内,纳米线/石蜡复合材料的介电色散谱的虚部在5GHz处有一个主峰,在10GHz附近有一个较弱的峰;德拜弛豫特性和材料的电导率对这两个峰的形成均有贡献.同时,其磁导率色散谱的虚部在频率为6.1GHz处有一个主峰,在10GHz以上有两个较微弱的峰.前一个峰源于自然共振机理,可利用Landau–Lifshitz–Gilbert方程拟合;而后两个峰则归结于涡流效应.对复合材料的厚度加以调整,其微波反射损耗值可低于-20dB,表明此材料可以作为一种新型的微波吸收剂.
Electrochemical pulse deposition was used to fabricate cobalt nanowires in the direction perpendicular to the direction of magnetization anisotropy (c-axis) perpendicular to the nanowires. Influenced by such factors as magnetocrystalline anisotropy, magnetostatic interaction and shape anisotropy As a result of the competition, the hysteresis loops of the nanowire arrays show weaker magnetic anisotropy.In addition, the imaginary part of the dielectric chromatic dispersion of the nanowire / paraffin composite is observed at 5 GHz in the 2-18 GHz frequency range One of the main peaks has a weaker peak near 10 GHz and the Deby relaxation properties and the conductivity of the material both contribute to the formation of these two peaks.At the same time the imaginary part of the dispersion of its permeability has a peak at a frequency of 6.1 GHz There is a main peak at 10GHz and above, there are two weaker peaks.The first peak originates from the natural resonance mechanism and can be fitted by the Landau-Lifshitz-Gilbert equation, and the latter two peaks are attributed to the eddy current effect. Thickness adjustment, the microwave reflection loss value can be less than -20dB, indicating that the material can be used as a new type of microwave absorber.