Preparation and magnetic properties of iron-palladium alloy nanoarrays by template-assisted AC electrodeposition

Fe-Pd alloy nanowires have been fabricated successfully by alternating current (AC) pulse electrodeposition in the porous anodic aluminum oxide (AAO) template at room temperature. AFM and TEM analysis show that the pore diameter of Fe-Pd nanowires is about 30-40 nm, the line spacing is 60-80 nm, and the aspect ratio is more than 100. Moreover, Fe-Pd nanowires in AAO also exhibits obvious magnetic anisotropy, that is, they magnetized along the nanowires length direction other than the nanowires diameter direction, and there have been exchanged anisotropy speculate in nanowires stochastically through asymmetrical hysteresis loop.