This paper aims to investigate the influence of structure parameters on giant-magnetoimpedance (GMI) effect measured by non-contact method.,The GMI sensor contains a Co-based internal magnetic core fabricated by laser cutting and an external solenoid. The influences of magnetic permeability of magnetic core and structure parameters on GMI effect were calculated in theoretical model. The output impedance, resistance, reactance and GMI ratio were measured by non-contact method using impedance analyzer.,Enhancing external magnetic field intensity can decrease the magnetic permeability of core, which has vital influences on the magnetic property and the output response of GMI sensor. In addition, increasing the width of magnetic core and the number of solenoid turns can increase the maximum GMI ratio. The maximum GMI ratio is 3,230% with core width of 6 mm and solenoid turns of 200.,Comparing with traditional contact-measured GMI sensor, the maximum GMI ratio and the magnetic field sensitivity are improved and the power consumption is decreased in non-contact measured GMI sensor. GMI sensor measured by non-contact method has a wide range of potential applications in ultra-sensitive magnetic field detection.

中文翻译：

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非接触法测量结构参数对巨磁阻抗效应的影响研究

本文旨在研究结构参数对通过非接触方法测量的巨磁阻抗 (GMI) 效应的影响。GMI 传感器包含一个由激光切割制成的 Co 基内部磁芯和一个外部螺线管。在理论模型中计算了磁芯导磁率和结构参数对GMI效应的影响。使用阻抗分析仪通过非接触法测量输出阻抗、电阻、电抗和GMI比。,增强外部磁场强度会降低磁芯的磁导率，这对GMI传感器的磁性能和输出响应具有重要影响. 另外，增加磁芯宽度和螺线管匝数可以提高最大GMI比。最大 GMI 比率为 3，230%，磁芯宽度6mm，螺线管匝数200.,与传统接触式GMI传感器相比，非接触式GMI传感器的最大GMI比和磁场灵敏度提高，功耗降低。非接触式测量的GMI传感器在超灵敏磁场检测中具有广泛的潜在应用。