Magnetic properties of the NixCo1−x/Cu multilayer nanowires

• Chemical ratios of NiCo/Cu multilayer nanowires were investigated.
• The coercivity easy axis keeps perpendicular to the nanowires.
• Curling mode happens when the applied field is parallel to the nanowire.
• Coherent and curling reversal mode occurs when the applied field is perpendicular.

The NiCo/Cu multilayer nanowires with 100 nm diameter have been fabricated by electrodeposition technique using a template directed method. The magnetic properties depend on the structure and compositions of the nanowires. Changing the chemical ratio between Ni and Co, the easy axis of the NiCo/Cu multilayer nanowires keeps perpendicular to the nanowires. The coercivity of the nanowire increases when increasing the ratio of Co. According to the micromagnetic simulation, when the applied field is parallel to the axis of the nanowire, the magnetization reversal process starts by curling of the ferromagnetic layer and the reversal mechanism occurs by an intermediate mode between coherent and curling reversal modes with the applied field perpendicular to the axis of the nanowire.

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