An array of FeCo nanotubes has been fabricated in the pores of porous anodic aluminum oxide templates. The morphology, structure, and composition of the nanotube array were characterized by transmission electron microscopy, x-ray diffraction, and atomic absorption spectroscopy. Magnetostatic energy analysis and transmission Mössbauer spectroscopy measurements were used to investigate the distribution of magnetic moments in nanotubes. Magnetization hysteresis loops indicate that, due to the unique shape of the nanotube, the nanotube array could be magnetized more easily by the field that is applied parallel to the axis of nanotubes.

An array of FeCo nanotubes has been successfully fabricated in the pores of porous anodic aluminum oxide (AAO) templates by wetting templates method. The morphology and structure of the nanotube array were characterized by scanning electron microscopy, transmission electron microscopy and x-ray diffraction. The average diameter of the nanotubes was about 200 nm, and the length was more than 10 µm. Vibrating sample magnetometer and superconducting quantum interference device were used to investigate the magnetic properties of the nanotube array. Interaction between the nanotubes has been found to be demagnetizing as expected and the switching field distribution is broad.