Fabrication and magnetic properties of Co xPd 1−x composite nanowire

Abstract

A series of Co x Pd 1− x ( x = 0.37 – 0.85 ) nanowire arrays have been successfully deposited in a single Co 2+/ Pd 2+=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 Co 0.85Pd 0.15 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 Co x Pd 1− x nanowire is around Co 0.73Pd 0.27 in which the coercivity ( H c) and squareness ( M r/ M s) have their maximum values consistently.