Preparation and Characterization of High Aspect Ratio Electrodeposited CoPt Multilayered Magnetic Nanowires

High aspect ratio CoPt multilayered alloy nanowires were prepared by low-cost electrodeposition technique utilizing polycarbonate template membrane (PT). The nanoholes with a 100 nm diameter of the PT were filled with CoPt multilayered alloy to generate nanowires while the potential was varied to modulate the composition of CoPt alloy. The obtained CoPt multilayered nanowires had a bamboo-like periodic structure with a relative chemical composition of [Co
80
Pt
20
/Co
30
Pt
70
]n. Magnetic and structural properties of multilayered nanowires have been evaluated. A single Co-rich alloy (relative composition of Co
80
Pt
20
) nanowire was also fabricated and exhibited ferromagnetic properties. The CoPt multilayered nanowires demonstrated improvement in magnetic anisotropy compared to the single-layered Co-rich alloy nanowires. The developed technique and multilayered nanowires can be used for emerging three-dimensional magnetic domain wall memory.