FeCuNbSiB薄膜的纵向驱动巨磁阻抗效应

采用磁控溅射方法制备了单层FeCuNbSiB薄膜，利用HP4294A型阻抗分析仪测量了经不同温度退火的3种不同厚度FeCuNbSiB薄膜的纵向驱动巨磁阻抗效应．实验结果表明：不同厚度薄膜样品的最佳退火温度均为300℃；经300℃退火的0．8，1．5和3．0μm厚薄膜样品在40kHz驱动频率下的最大巨磁阻抗比分别为60．112％，262．529％和400．279％，外场灵敏度分别为1．06％，3．85％和3．03％／（A·m^-1）．采用纵向驱动模式可以使单层FeCuNbSiB薄膜在低频下呈现对弱场灵敏响应的巨磁阻抗效应．

The longitudinally driven giant magneto-impedance effect of FeCuNbSiB films

FeCuNbSiB single-layer films were prepared by magnetron sputtering.An HP4294A impedance analyzer was used to measure the curves of longitudinally driven giant magneto-impedance.Films with three kinds of thickness were annealed under different temperatures.The results showed that the best annealing temperature was 300 ℃ for samples with different thickness.At a driven frequency of 40 kHz for the samples annealed at 300 ℃,the maximum giant magneto-impedance effect of the samples with thickness of 0.8,1.5 and 3.0 μm was 60.112%,262.529% and 400.279%,respectively.The sensitivity was 1.06%,3.85% and 3.03%/(A·m-1),respectively.The longitudinally driven giant magneto-impedance effect of FeCuNbSiB single-layer films showed a high sensitivity to weak field in the low frequency range.