Effect of AC Electrodeposition Conditions on Microstructure and Magnetic Properties of CO_xNi(1-x) Nanowire Arrays Embedded in Anodic Aluminum Oxide Template

摘要

CO_xNi(1-x) alloy nanowire arrays were fabricated by ac electrodeposition technique into nanoporous alumina membranes. The effect of frequency, composition and electrolyte on the crystalline structure and magnetic properties of nanowire arrays were investigated. Different alloy nanowires were prepared with 50, 100, 200, 300, 400, 500, 800, and 1000 Hz deposition frequencies. Obtained results showed both the coercivity and squareness (parallel to the nanowires axis) weakly depend on the frequency and electrolyte. The coercivity initially decreased with increase in frequency then increased. This trend was more pronounced for Co-rich CO_xNi(1-x) nanowires. A coercivity of 1560Oe was obtained which may be due to the predomination of (002) direction at 1100 Hz deposition frequency.