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Ni80Fe20复合结构多层膜的巨磁阻抗效应研究
Study on Giant Magneto-Impedance Effect in Ni80Fe20 Composite Multilayers
【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(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.
【Abstract】 The (Ni80 Fe20/SiO2)n/Cu/(SiO2/Ni80 Fe20)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 (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 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.
【Key words】 X-ray diffraction; magnetic hysteresis loop; GMI effect; Ni80Fe20 multilayers;
- 【文献出处】 华东师范大学学报(自然科学版) ,Journal of East China Normal University(Natural Science) , 编辑部邮箱 ,2007年01期
- 【分类号】O484.4
- 【被引频次】1
- 【下载频次】119