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摘要: 用磁控溅射法在载玻片上制备了(Ni80Fe20/SiO2)n/Cu/(SiO2/Ni80Fe20)n复合结构多层膜， 并对其巨磁阻抗效应进行了研究.研究结果表明，采用多组双层结构(n1)后，样品的巨磁阻抗效应明显增大；当n=3时，观测到最大的纵向巨磁阻抗(LMI)效应为10.81%，最大的横向巨磁阻抗(TMI)效应为17.08%.当n=4,5时，巨磁阻抗效应比n=3时略有减小. 由XRD谱和磁滞回线等，研究了双层结构(Ni80Fe20/SiO2)循环次数n引起的样品材料晶体结构和磁性能等变化，以及对样品巨磁阻抗效应的影响.
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关键词:
- X射线衍射谱 /
- 磁滞回线 /
- 巨磁阻抗效应 /
- Ni80Fe20复合结构多层膜
Abstract: The(Ni80Fe20/SiO2)n/Cu/(SiO2/Ni80Fe20)n composite multilayers were deposited onto glass substrates using RF magnetron sputtering equipment. The giant magneto impedance (GMI) effect was been investigated. The results show that the GMI effect enhanced, when the (Ni80Fe20/SiO2) bilayers structure repeated in the sample. At n=3, the maximum LMI ratio is 10.81%，while the maximum TMI ratios is 17.08%. And when n increases to 4 and 5, the MI ratios decrease slightly compared with the ratios at n=3. By the Xray diffraction spectrums and the hysteresis loops, the change of the samples′ crystallization structure, magnetism characteristic and GMI effect were studied, which were induced by the number of bilayers. -
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