Ni80Fe20复合结构多层膜的巨磁阻抗效应研究

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(n>1)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.

Study on Giant Magneto-Impedance Effect in Ni80Fe20 Composite Multilayers

The (Ni_(80) Fe_(20)/SiO_2)_n/Cu/(SiO_2/Ni_(80) Fe_(20))_n composite multilayers were deposited onto glass substrates using RE magnetron sputtering equipment.The giant magneto-impedance (GMI) effect was been investigated.The results show that the GMI effect enhanced,when the (Ni_(80)Fe_(20)/SiO_2) 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 X-ray diffraction spectrums and the hysteresis loops,the change of the samples'crystallization structure,magnetism characteris- tic and GMI effect were studied,which were induced by the number of bilayers.