Synthesis and magnetic properties of Ni/Fe shell/core nanocable arrays

Ordered Ni/Fe shell/core structured nanocable arrays were successfully fabricated by a two-step electrodeposition process. Firstly, nickel (Ni) nanotubes were prepared by electrodeposition in nanoporous of anodic aluminum oxide (AAO) template. Then the AAO/Ni nanotube composite membrane was used as a secondary template to deposit Ferrum (Fe) nanowires into Ni nanotubes. The morphology and microstructure of the nanocables was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The chemical composition of the nanocables was confirmed by X-ray diffraction (XRD). Magnetization measurements revealed that Ni/Fe nanocable arrays have a lower remanence ratio than Ni nanotube and Fe nanowire arrays respectively. •Ni/Fe shell/core structured nanocable arrays were successfully fabricated by a two-step electrodeposition process.•Magnetic hysteresis (M–H) loops have confirmed that magnetization direction is alone the long axes of the nanotubes.•There exists demagnetization among Ni and Fe alloy.