Fabrication and magnetic properties of FeCo alloy nanotube array

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.