Co_(68.15)Fe_(4.35)Si_(12.5)B_(15)非晶丝的制备及巨磁阻抗效应  

Preparation and Giant Magneto-impedance Effect of Co_(68.15)Fe_(4.35)Si_(12.5)B_(15) Amorphous Wire

作　　者：刘春伟[1] 孙光飞[1] 陈菊芳[1] 强文江[1] 王淼[1] 汪锋[1] 郝洁[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《磁性材料及器件》2007年第4期31-33,共3页Journal of Magnetic Materials and Devices

基　　金：国防基础研究科研项目(A1420060203);民口配套研制项目(MKPT-05-001)

摘　　要：非晶丝的巨磁阻抗效应可应用于微磁传感器。利用旋转水中纺丝法制备了直径140μm的Co68.15Fe4.35Si12.5B15非晶丝,热处理后的XRD谱表明为非晶结构。在Agilent 4294A 阻抗分析仪上测量非晶丝的阻抗在外磁场下随交流电频率的变化。结果显示,样品在不同频率下表现出不同的巨磁阻抗效应,频率为3MHz时,非晶丝的巨磁阻抗变化率最大为270%,对磁场的最大灵敏度达到2.06%/A·m-1。Giant magneto-impedance effects have been applied to micro-magnetic sensors. The Co68.15Fe4.35Si12.5B15 amorphous wires with 140gm in diameter were prepared by in-rotating-water spinning method. The XRD analysis indicates that the heat-treated specimen is in amorphous state, The change of impedence with frequency of AC current under external magnetic field was measured on Agilent 4294A Precision Impedance Analyzer. The results show that the sample has different GMI effects under different frequencies. The maximum GMI ratio is 270% and the maximum magnetic field sensitivity reaches 2,06%/A · m^-1 at frequency of 3MHz.

关 键 词：旋转水中纺丝法 非晶丝 巨磁阻抗 微磁传感器 

分 类 号：TG139.8[一般工业技术—材料科学与工程] O484.5[金属学及工艺—合金]