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电沉积复合丝及其巨磁阻抗效应的研究
赵洪英,姚素薇*,张卫国,王宏智,韩文仲
作者单位E-mail
赵洪英 天津大学化工学院应用化学系,天津,300072;天津理工大学材料物理所,天津,300191  
姚素薇* 天津大学化工学院应用化学系,天津,300072 yaosuwei@263.net 
张卫国 天津大学化工学院应用化学系,天津,300072  
王宏智 天津大学化工学院应用化学系,天津,300072  
韩文仲 天津理工大学材料物理所,天津,300191  
摘要:
采用脉冲电沉积工艺在Cu丝上沉积Fe-Ni合金镀层,成功地制备出巨磁阻抗效应(GMI)复合丝材料,研究了复合丝的磁性能和巨磁阻抗效应.复合丝外壳磁性镀层软磁性越好,巨磁阻抗效应越明显,制备的复合丝最高巨磁阻抗效应为27.19%.研究了复合丝阻抗与巨磁阻抗比值GMI随外加磁场的变化,其变化曲线的形状受复合丝磁各向异性场的影响.此外,还研究了复合丝巨磁阻抗效应与驱动交变电流频率的关系,复合丝Fe17Ni83样品巨磁阻抗效应的临界频率为30 kHz(GMI为9.95%),特征频率为300 kHz(GMI为27.19%),截止频率为 10 MHz (GMI为10.36%).如此低的临界频率和特征频率及较宽的频率段对于实际应用非常有利.
关键词:  铁镍合金  脉冲电沉积  巨磁阻抗  复合丝
DOI:10.1088/1674-0068/17/6/752-756
分类号:
基金项目:
Study of the Giant Magnetic Impedance Effect in Electro-depositied Complex Wire
Zhao Hongying,Yao Suwei*,Zhang Weiguo,Wang Hongzhi,Han Wenzhong
Abstract:
The Giant Magnetic Impedance(GMI)effect of complex wires which were produced by pulse electrodeposing Fe-Ni alloy over cylindrical Cu substrates has been studied. It is found that the soft magnetic property is better,and the GMI effect of the sample is stronger. The maximum GMI ratio is 27.19% among these samples. The dependance of the impedance and GMI ratio on DC magnetic field is influenced by magnetic anisotropy in magnetic microtubes of complex wire. The variation of GMI effect with AC current frequency is investigated. The experimental results show that the GMI effect of the complex-structure sample Fe17 Ni83 has a very low critial frequency of 30 kHz(GMI=9.95%)and charicteristic frequency 300 kHz(GMI=27.19%)and its cutoff frequency is 10 MHz(GMI=10.36%). Not only such low critial and charicteristic frequency but also wider work frenquency range are of importance for technological applications.
Key words:  Fe-Ni alloy,Pulse electrodeposition,Giant magnetic impedance(GMI),Complex wire