Fabrication and magnetic properties of CoxPd1−x composite nanowire

A series of CoxPd1−x   (x=0.37–0.85x=0.37–0.85) nanowire arrays have been successfully deposited in a single Co2+/ Pd2+=20:1 solution by applying the various depositing potentials. We found that the nanowires are the composites of CoPd alloy with some Co and Pd clusters, but the overall structure of the composite wires followed the binary phase relation of Pd–Co. The existence of Pd content makes the nanowires structured in FCC phase, except for Co0.85Pd0.15 sample in which some HCP Co phase coexists with the dominating FCC phase. Between Co-rich and Pd-rich nanowires, we found that the optimized composition for CoxPd1−x nanowire is around Co0.73Pd0.27 in which the coercivity (Hc) and squareness (Mr/Ms) have their maximum values consistently.