淬态FeNiCrSiB薄带的磁特性和纵向巨磁阻抗效应  

Longitudinal Giant Magneto-Impedance and Magnetic Properties of As-Quenched FeNiCrSiB Ribbons

作　　者：邵先亦[1] 陈卫平[1] 李志刚[1] 吴海华[2] 杜运波[1] 

机构地区：[1]浙江台州学院物理与电子工程学院,台州318000 [2]浙江杭州师范大学物理系,杭州310036

出　　处：《真空科学与技术学报》2011年第6期743-747,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金资助项目(51001078)

摘　　要：采用单辊快淬法制备了(Fe50Ni50)77.5Cr0.5Si11B11合金薄带,测试了淬态薄带样品的微结构、静磁性能、磁导率和磁阻抗。研究结果表明,未经热处理的淬态(Fe50Ni50)77.5Cr0.5Si11B11合金薄带便具有良好的软磁性能和显著的巨磁阻抗效应,在7MHz频率下,纵向最大阻抗比达到31%。同时分析了几个典型频率下的纵向磁阻抗比、电阻比、电抗比和有效磁导率比随外磁场的变化行为,发现薄带样品的电抗比和有效磁导率比之间存在密切联系。由于内部结构的不均匀性,使得样品的横向各向异性场随驱动电流频率增大向高场方向移动。The（Fe50Ni50）77.5Cr0.5Si11B11composite ribbons were fabricated by melt-spinning.The impacts of the sample preparation conditions on its microstructures and magnetic properties were studied with X-ray diffraction and conventional techniques.The results show that the as-quenched ribbons exhibit good soft magnetic property,and that its maximum longitudinal giant magneto-impedance ratio can be 31% at a frequency of 7.0 MHz.In addition,the field dependence of its magneto-impedance ratio,resistance ratio,reactance ratio,and effective permeability ratio were evaluated.We found that the reactance ratio strongly correlates to the effective permeability ratio.As the frequency of the driven current increases,the transverse anisotropic field tends to move along the increasing direction of the external field,possibly because of the inhomogeneity of its microstructures.

关 键 词：FeNiCrSiB薄带 巨磁阻抗效应 电阻 电抗 有效磁导率 

分 类 号：TG139[一般工业技术—材料科学与工程]