While the effect of bias direct currents on longitudinal giant magnetoimpedance (GMI) has been well studied, there have been very few investigations of their effect on perpendicular GMI. We report an experimental investigation of the influence of bias direct currents on perpendicular GMI in meander-line NiFe/Cu/NiFe/Cu/Cr films. The low-field sensitivity and linearity of perpendicular GMI both increased with the use of bias currents for high frequencies (>5 MHz), and the field-dependent linear range of the impedance became wider with increasing frequency. This lays a solid foundation for the development of low-field GMI sensors with high sensitivity and linearity, which are particularly well suited for the detection of weak perpendicular magnetic fields.

中文翻译：

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直流偏置对折线多层结构垂直巨磁阻抗的影响

虽然偏置直流对纵向巨磁阻抗 (GMI) 的影响已经得到很好的研究，但关于它们对垂直 GMI 的影响的研究却很少。我们报告了偏置直流对曲折线 NiFe/Cu/NiFe/Cu/Cr 薄膜中垂直 GMI 影响的实验研究。垂直 GMI 的低场灵敏度和线性度都随着高频（> 5 MHz）偏置电流的使用而增加，并且阻抗的场相关线性范围随着频率的增加而变得更宽。这为开发具有高灵敏度和线性度的低场 GMI 传感器奠定了坚实的基础，特别适用于弱垂直磁场的检测。