一维磁性纳米线由于其具有高矫顽力、高剩磁比等良好的磁性能，可用作高密度存储介质，因此成为人们的热门研究对象。目前纳米薄膜的研究技术已经比较成熟，而对一维纳米线的磁性能研究是一个较新也比较有前景的研究课题，尤其是一维分段纳米线的形状各向异性对其磁性能的影响使得一维纳米材料成为当今研究信息存储材料的热门领域。随着相干场发射电子枪的发展，电子全息术得到了更广泛的应用，其高分辨率的特性，为获得纳米线的精细磁结构提供了技术支持。 本文主要对Co/Pt分段纳米线的制备过程及磁性能进行了系统的研究。以多孔有序的氧化铝为模板，通过直流电化学沉积法成功的制备了Co/Pt分段纳米线，用X射线多晶衍射仪、扫描电子显微镜、透射电子显微镜以及电子全息对纳米线的成分、形貌、结构以及精细磁结构进行了系统的研究。结果发现沉积的纳米线表面完好、比较规则且粗细均匀，Co与Pt分段的节点也比较明显；Co为hcp（六角晶格）结构，并根据晶格常数d计算出了晶面指数；通过电子全息观测了单根纳米线内部的磁力线，并计算出纳米线的磁化强度。

Magnectic nanowires can be used as high density storage media because of the good magnetic properties, such as high coercivity and high remanence ratio. They have become the key issue in such research field. Nowadays the research of One-dimensional magnetic nanowires is a relatively new and more promising research topic. Especially the shape anisotropy of the one-dimensional magnetic segmented nanowires can applicate in the high density storage field. With the development of the coherent field emission electron gun, the electron holography has been more widely used. As its high resolution, it has provided the technical support for obtain better magnetic nanowires structure. In this paper, we focus on the preparation process of Co/Pt segmented nanowires and the research of magnetic properties. The Co/Pt segmented nanowires are successfully prepared by DC electrochemical deposition in porous aluminum oxide templates. The composition, microstructure, and magnetic structure of the nanowires are observed by X-ray diffraction , scanning electron microscope , transmission electron microscope and electron hologram. It is found that the surface of nanowires is in good condition and nanowires arrays are regular. The diameter of the nanowires is in the same size and the Co/Pt nodes are clear. It is also found that Co is hexagonal structure and the crystal planes are indexed accordingly. The magnetic flux lines in the nanowires are observed by electron hologram and the magnetic induction is then evaluated.