Effect of AC Electrodeposition Conditions on Microstructure and Magnetic Properties of CoxNi1-x Nanowire Arrays Embedded in Anodic Aluminum Oxide Template

Abstract

Cox Ni1x 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 1000Hz 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 Cox Ni1x nanowires. A coercivity of 1560 Oe was obtained which may be due to the predomination of (002) direction at 1100 Hz deposition frequency.