不同驱动方式下钴基非晶条带的巨磁阻抗效应  

Giant magneto-impedance effect of Co-based amorphous ribbon driven by different patterns

作　　者：黄敬晖[1] 丁昂[1] 张延松[1] 钱坤明[1] 纪松[1] 李明利[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315000

出　　处：《磁性材料及器件》2013年第4期9-13,共5页Journal of Magnetic Materials and Devices

摘　　要：研究了Co66Fe6Ni2Si11B15非晶条带在"横向驱动+对角提取"、"横向驱动+非对角提取"以及纵向驱动三种驱动方式下的巨磁阻抗效应特性。通过改变非晶条带的巨磁阻抗效应驱动方式,观察三者在直流外磁场作用下输出信号的变化规律,并对它们的性能优劣进行比较。实验结果表明,驱动电流频率变化会对材料的巨磁阻抗效应产生较大的影响。此外,在三种驱动方式中,与该条带最匹配的驱动方式是"横向驱动+非对角提取"方式,即在此种方式下,条带所显现的巨磁阻抗性能最为显著,其最大电压变化灵敏度可达1.878V/mT,最大电压变化率为98.21%。相比于其余两种驱动方式,"横向驱动+非对角提取"方式在巨磁阻抗传感器件中具有更大的潜力。Giant magneto-impedance effect of Co66Fe6Ni2Si11B15 amorphous ribbon, which was driven ＂horizontally with diagonal extract＂, ＂horizontally with off-diagonal extract＂ and vertically were investigated extensively. By changing driving pattern the GMI output signals with applied DC field of amorphous ribbon have been measured to compare their giant magneto-impedance properties. The experimental results shows that frequency of drive current has a significant effect on their giant magneto-impedance. Further more, among the three driving patterns, the ribbon is matched best for driving ＂horizontally with off-diagonal extract＂ pattern. For this driving pattern, the amorphous ribbon has the best giant magneto-impedance with maximum voltage sensitivity up to1.878V/mT, and the maximum rate of voltage change is 98.21%. Compared with other two driven patterns, driving ＂horizontally with off-diagonal extract＂ has more potential for GMI sensors.

关 键 词：钴基非晶条带 巨磁阻抗 驱动方式 灵敏度 

分 类 号：TG139.8[一般工业技术—材料科学与工程]