Fabrication and Magnetic Characteristics of Vertical FeCo Nanowire Arrayed in Al₂O₃ Insulator of Honeycomb Bulkhead Structure

High-density and uniform-sized FeCo alloy nanowires were prepared by electro deposition of Fe²⁺ and Co²⁺ into Anodic aluminum oxide (AAO) templates with two different diameters. These templates were fabricated with three-step anodization method. The additional anodization after the 2nd anodization step resulted in the decrease of the thickness of bottom barrier layer. It found an optimum condition to obtain a successful electrodeposition of Fe²⁺ and Co²⁺ into AAO templates. The nanowires with the diameters of 25 nm and 80 nm were homogeneously embedded in the AAO templates and their magnetic properties were strongly affected by diameters of nanowire.