曲折形三层等宽FeCuNbSiB/Cu/FeCuNbSiB多层膜巨磁阻抗效应研究

Giant Magneto-impedance Effect in Trilayer FeCuNbSiB/Cu/FeCuNbSiB Films with a Meander Structure

采用磁控溅射方法，在玻璃基片上制备了曲折形三层等宽FeCuNbSiB／Cu／FeCuNbSiB多层膜。在1．40MHz下，研究了多层膜材料的巨磁阻抗（GMI）效应随外加磁场的变化关系。结果表明：在频率为5MHz、磁场强度为12kA／m下，横向和纵向GMI效应分别达-23．5％和-16．8％。薄膜材料的纵向、横向GMI效应随外加磁场变化呈现先增后降，而纵向表现尤为明显。

Trilayer FeCuNbSiB/Cu/FeCuNbSiB films with a meander structure were prepared by magnetron sputtering method, and the giant magneto-impedance （GMI） effect was investigated in the frequency range of 1-40 MHz. The results show that the GMI values are -23.5% and -16.8% for a frequency of 5 MHz at a magnetic field of 12 kA/m with magnetic field applied along the longitudinal and transverse direction, respectively. Both the longitudinal and the transverse GMI effect increases with applied magnetic field, reaching a maximum at a field of near the anisotropy field, while the longitudinal GMI effect are better than that of the transverse direction.