FexPt(1-x) nanowire arrays embedded in porous alumina membranes with controlled diameters and high aspect ratios were fabricated by the pulse electrodeposition method in a novel bath with a simple composition. The composition of FexPt(1-x) nanowires can be highly controlled by the negative deposition voltage and the pulse duration. A growth mode of alternating Fe and Pt composition within wires is observed for electrodeposition in different periods of pulse time. The space separation between the iron-rich layer and the platinum-rich layer contributes to the relatively low coercivity of FexPt(1-x) nanowire arrays with an atomic ratio of 1:1.
Bibliographical noteFunding Information:
The authors thank Professor S. M. Zhou, Mr. Y. Y. Chen and S. J. Zhang for VSM measurements. This work is supported by the NSF of China (NSFC) (Grant Nos. 50771032, 50771033, 61078030, 11074046, and 51071046) and the National Basic Research Program of China (2009CB929201).