中文摘要：

采用单辊快淬法制备Fe_（36）Co_（36）Nb_4Si_（4.8）B_（19.2）（FeCo基）合金非晶薄带,流动气体中外加张应力电流退火的方法制备不同磁结构的样品.采用阻抗仪测量各样品的纵向驱动巨磁阻抗（LDGMI）效应曲线.通过比对分析不同应力退火样品的LDGMI曲线特征参量（半高宽、最大巨磁阻抗比值）与驱动频率之间关系曲线的差异,以及比对不同腐蚀深度样品的差异,依据趋肤效应原理及LDGMI曲线与材料磁各向异性关系的理论,揭示了FeCo基非晶薄带应力退火感生磁结构的特性及机理.

英文摘要：

The FeCo-based ribbons（Fe_（36）Co_（36）Nb_4Si_（4.8）B_（19.2）） with dirrerent magnetic structures were prepared by single roller quenched method and then annealed with direct current under tensile stress in flowing atmosphere.The longitudinally driven giant magneto-impedance（LDGMI） effect in the stress-Joule-heated FeCo-based ribbon was measured with HP4294A impedance analyzer.The dependences between the characteristic parameters of the LDGMI profiles,ratio of giant magneto-impedance and half-height width of the applied magnetic field at the bottom,and driving current frequency were analyzed.The difference of the LDGMI profiles of the annealed FeCo-based ribbons with various remained thicknesses obtained by etching with 16.7%HCl solution was compared.The mechanism and the character of the stress-induced magnetic structure in FeCo-based ribbons were exposured by means of the principle of the skin effect and the theory of the dependence of giant magneto-impedance on the magnetic anisotropy in the magnetic materials.