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中文摘要：
用化学镀的方法制备了NiFeCoP／CuBe复合结构丝，研究了其巨磁阻抗特性．结果表明复合结构丝在较低频率的驱动电流下就有明显的磁阻抗效应，当驱动电流频率在20kHz时的磁阻抗效应为40％，最大磁阻抗效应出现的频率在180kHz,为97％．利用复数磁导率和等效电路探讨了该复合丝铁磁层磁化过程的频率特性，复合结构丝的特征弛豫频率在1MHz左右．外加直流磁场抑制畴壁移动，在等效电路中与抵消部分并联电路相关．
英文摘要：
The NiFeCoP/CuBe composite wire is produced by electroless-deposition. The composite wire shows distinct magnetoimpedance effect at low frequency. The maximal GMI ratio is 40% at 20kHz and about 97% at 180kHz. The frequency dependence of magnetization in NiFeCoP composite wire is analyzed in terms of equivalent circuits and complex permeability. The relaxation frequency of the composite wire is about 1MHz. The displacement of domain wall can be damped by the DC applied field. So the effect of the DC applied field is to eliminate the parallel RL circuit.
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