A Preliminary Study on the Synthesis and Characterization of Multilayered AgCo Magnetic Nanowires Fabricated via the Electrodeposition Method

Abstract EN

A single-bath electrodeposition method was developed to integrate multilayer Ag/Co nanowires with a commercial anodic alumina oxide (AAO) template with a pore diameter of 100–200 nm.

An electrolyte system containing silver nitride and cobalt sulfide was studied using cyclic voltammetry, and the electrodeposition rate was varied to optimize the electrodeposition conditions.

A constant stepwise potential and a variable cation ratio of [Co2+]/[Ag+] were used during electrodeposition.

After the dissolution of the template in aqueous NaOH solution, multilayered Ag/Co nanowires were obtained with a composition of [Co]/[Ag80Co20], as identified by XRD and TEM, when [Co2+]/[Ag+] = 150.

By annealing at 200°C for 1 h, uniformly structured (Co99.57/Ag100) nanowires were obtained.

Compared with pure Co nanowires, the magnetic hysteresis loops showed a greater magnetic anisotropy for (Co99.57/Ag100) nanowires than for pure Co nanowires, corresponding to a change in the easy axis upon magnetization.