【作者】 赵洪英； 姚素薇； 张卫国； 王宏智； 韩文仲；

【Author】 Zhao Hongying~(a,b),Yao Suwei~a,Zhang Weiguo~a,Wang Hongzhi~a,Han Wenzhong~b (aSchool of Chemical Engineering and Technology,bTianjin University 300072; Institute of Materal Physics,Tianjin University of Technology 300191)

【机构】 天津大学化工学院应用化学系； 天津理工大学理学院材料物理所；

【摘要】 采用脉冲电沉积工艺在直径为200微米的铜丝表面沉积铁镍合金镀层,形成具有同轴电缆结构的巨磁阻抗复合丝材料。分别改变复合丝磁性外壳厚度与铜丝直径,研究复合丝结构对巨磁阻抗效应的影响。发现巨磁阻抗比值随磁性外壳厚度的增大及铜丝直径的增大而增大,特征频率则向低频端移动。本文还发现在外加直流磁场低于5.57kA/m时,驱动交流电幅值增大,巨磁阻抗效应增大;高于5.57kA/m时,驱动交流电幅值的大小不再影响复合丝的巨磁阻抗效应。在驱动电流上叠加20mA以下的直流偏置对巨磁阻抗效应没有影响。更多还原

【Abstract】 FeNi-Cu complex wire having giant magnetic impedance effect(GMI) have been produced by pulse electrodeposing FeNi alloy over cylindrical Cu Substrates.One group of samples with different magnetic shell thickness and same Cu wire diameter and the other group of samples with different Cu wire diameter and same magnetic shell thickness have been prepared respectively to investigate the influence of them to GMI.It is found that the magnetic shell is thicker or Cu wire diameter is bigger,the GMI effect is stronger as well as the charicteristic frequency is lower.It is also found that when DC magnetic field is below 5.57kA/m,,complex wire is provided with bigger GMI ratio as the amplitude of AC current flowing through it is greater,but when DC magnetic field is over 5.57kA/m,GMI ratio don’t depend on amplitude of AC current.GMI effect has no change when adding a DC bias current below 20 mA.更多还原