驱动电流对制备态钴基非晶丝GMI效应的影响  

Influence of driving current on giant magnetoimpedance effect of Co-based amorphous wires

作　　者：武继文[1] 王祖松[2] 张义权[3] 

机构地区：[1]南京医科大学基础医学院,江苏南京210029 [2]南京信息工程大学数理学院,江苏南京210044 [3]南京师范大学物理科学与技术学院,江苏南京210097

出　　处：《武汉科技大学学报》2010年第3期282-285,共4页Journal of Wuhan University of Science and Technology

基　　金：江苏省高校自然科学基金资助项目(07KJB140054);南京医科大学科技发展基金项目(09NJMUM004)

摘　　要：采用熔融抽拉法制备Co68.25Fe4.5Si12.25B15非晶丝材料,研究了不同振幅和频率的交流驱动电流对制备态非晶丝巨磁阻抗(GMI)效应的影响,分析了该组分非晶丝GMI比率较高的原因。结果表明,随着驱动电流振幅和频率的增加,该组分非晶丝的GMI比率均为先增后减;当驱动电流振幅和频率分别为5.5 mA和9.5MHz时,其GMI比率达到620.2%。Co68.25Fe4.5Si12.25B15 amorphous wires were produced by melt-extraction method.The influence of the driving AC current of different amplitudes and frequencies on GMI effect has been investigated.The results show that the GMI ratios first increase and then decrease with the increase of each of them.The highest magnetoimpedance ratio of 620.2% is obtained when the frequency and the amplitude of the driving current are 9.5 MHz and 5.5 mA,respectively.

关 键 词：GMI效应 驱动电流 钴基非晶丝 

分 类 号：O441.6[理学—电磁学]